- blockThe list of subdomains (names or ids) that this object will be restricted to. Leave empty to apply to all subdomains.
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:The list of subdomains (names or ids) that this object will be restricted to. Leave empty to apply to all subdomains.
- coefficient1.Name of property for diffusion coefficient k. A functor is any of the following: a variable, an MFEM material property, a function, a postprocessor or a number.
Default:1.
C++ Type:MFEMScalarCoefficientName
Controllable:No
Description:Name of property for diffusion coefficient k. A functor is any of the following: a variable, an MFEM material property, a function, a postprocessor or a number.
- variableVariable labelling the weak form this kernel is added to
C++ Type:VariableName
Unit:(no unit assumed)
Controllable:No
Description:Variable labelling the weak form this kernel is added to
MFEMDiffusionKernel
Overview
Adds the domain integrator for integrating the bilinear form
where and is a scalar diffusivity coefficient.
This term arises from the weak form of the Laplacian operator
Example Input File Syntax
[Kernels<<<{"href": "../../../syntax/Kernels/index.html"}>>>]
[diff]
type = MFEMDiffusionKernel<<<{"description": "Adds the domain integrator to an MFEM problem for the bilinear form $(k\\vec\\nabla u, \\vec\\nabla v)_\\Omega$ arising from the weak form of the Laplacian operator $- \\vec\\nabla \\cdot \\left( k \\vec \\nabla u \\right)$.", "href": "MFEMDiffusionKernel.html"}>>>
variable<<<{"description": "Variable labelling the weak form this kernel is added to"}>>> = concentration
[]
[]Input Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:No
Description:Set the enabled status of the MooseObject.
Advanced Parameters
Input Files
- (test/tests/mfem/kernels/diffusion.i)
- (test/tests/mfem/complex/complex.i)
- (test/tests/mfem/ics/transient_scalar_ic.i)
- (test/tests/mfem/transfers/mfem_sub_mfem_sub/sub_send.i)
- (test/tests/mfem/submeshes/cut_closed_coil.i)
- (test/tests/mfem/timesteppers/mfem_multiple_timesequences.i)
- (test/tests/mfem/kernels/diffusion_eigenproblem.i)
- (test/tests/mfem/transfers/h1_libmesh_parent_mfem_sub/mfem_sub_scalar.i)
- (test/tests/mfem/auxkernels/projection.i)
- (test/tests/mfem/kernels/diffusion_amr.i)
- (test/tests/mfem/transfers/mfem_parent_mfem_sub/sub_complex.i)
- (test/tests/mfem/vectorpostprocessors/point_value_sampler/point_value_sampler_diffusion.i)
- (test/tests/mfem/timesteppers/mfem_multiple_timesteppers.i)
- (test/tests/mfem/multiapps/sub_cycling_sub.i)
- (test/tests/mfem/variables/mfem_variables_from_moose.i)
- (test/tests/mfem/functions/parsed_function_source.i)
- (test/tests/mfem/submeshes/domain_submesh_transfer.i)
- (test/tests/mfem/multiapps/dt_from_parent.i)
- (test/tests/mfem/vectorpostprocessors/line_value_sampler/line_value_sampler_diffusion.i)
- (test/tests/mfem/multiapps/dt_from_parent_sub.i)
- (test/tests/mfem/transfers/mfem_parent_mfem_sub/mfem_sub_embedded_submesh.i)
- (test/tests/mfem/multiapps/full_solve_sub.i)
- (test/tests/mfem/submeshes/hphi_magnetostatic.i)
- (test/tests/mfem/kernels/heattransfer.i)
- (test/tests/mfem/kernels/nl_heatconduction.i)
- (test/tests/mfem/submeshes/domain_submesh.i)
- (test/tests/mfem/kernels/nl_heattransfer.i)
- (test/tests/mfem/kernels/irrotational.i)
- (test/tests/mfem/auxkernels/2Dmagnetostatic.i)
- (test/tests/mfem/multiapps/full_solve_parent.i)
- (test/tests/mfem/transfers/mfem_parent_mfem_sub/sub.i)
- (test/tests/mfem/submeshes/open_coil_source.i)
- (test/tests/mfem/multiapps/sub_cycling_parent.i)
- (test/tests/mfem/transfers/h1_mfem_parent_libmesh_sub/mfem_parent_scalar.i)
(test/tests/mfem/kernels/diffusion.i)
[Mesh]
type = MFEMMesh
file = ../mesh/mug.e
dim = 3
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[]
[Variables]
[concentration]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[concentration_gradient]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[grad]
type = MFEMGradAux
variable = concentration_gradient
source = concentration
execute_on = TIMESTEP_END
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'bottom'
coefficient = 1.0
[]
[top]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'top'
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = concentration
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[jacobi]
type = MFEMOperatorJacobiSmoother
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Outputs]
active = ParaViewDataCollection
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/Diffusion
vtk_format = ASCII
[]
[VisItDataCollection]
type = MFEMVisItDataCollection
file_base = OutputData/VisItDataCollection
[]
[ConduitDataCollection]
type = MFEMConduitDataCollection
file_base = OutputData/ConduitDataCollection/Run
protocol = conduit_bin
[]
[]
(test/tests/mfem/kernels/diffusion.i)
[Mesh]
type = MFEMMesh
file = ../mesh/mug.e
dim = 3
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[]
[Variables]
[concentration]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[concentration_gradient]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[grad]
type = MFEMGradAux
variable = concentration_gradient
source = concentration
execute_on = TIMESTEP_END
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'bottom'
coefficient = 1.0
[]
[top]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'top'
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = concentration
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[jacobi]
type = MFEMOperatorJacobiSmoother
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Outputs]
active = ParaViewDataCollection
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/Diffusion
vtk_format = ASCII
[]
[VisItDataCollection]
type = MFEMVisItDataCollection
file_base = OutputData/VisItDataCollection
[]
[ConduitDataCollection]
type = MFEMConduitDataCollection
file_base = OutputData/ConduitDataCollection/Run
protocol = conduit_bin
[]
[]
(test/tests/mfem/complex/complex.i)
mu = 1.0
epsilon = 1.0
sigma = 20.0
omega = 10.0
kappa_r = 12.7201964951406889525742371916
kappa_i = -7.86151377757423297509831172647
[Mesh]
type = MFEMMesh
file = ../mesh/inline-quad.mesh
dim = 2
[]
[Problem]
type = MFEMProblem
numeric_type = complex
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMComplexVariable
fespace = H1FESpace
[]
[]
[Functions]
[u0_r]
type = ParsedFunction
expression = exp(y*${kappa_i})*cos(y*${kappa_r})
[]
[u0_i]
type = ParsedFunction
expression = -exp(y*${kappa_i})*sin(y*${kappa_r})
[]
[stiffnessCoef]
type = ParsedFunction
expression = 1.0/${mu}
[]
[massCoef]
type = ParsedFunction
expression = -${omega}*${omega}*${epsilon}
[]
[lossCoef]
type = ParsedFunction
expression = ${omega}*${sigma}
[]
[]
[BCs]
[dbc]
type = MFEMComplexScalarDirichletBC
variable = u
coefficient_real = u0_r
coefficient_imag = u0_i
[]
[]
[Kernels]
[diffusion_complex]
type = MFEMComplexKernel
variable = u
[RealComponent]
type = MFEMDiffusionKernel
coefficient = stiffnessCoef
[]
[ImagComponent]
type = MFEMDiffusionKernel
coefficient = 0.0
[]
[]
[mass_complex]
type = MFEMComplexKernel
variable = u
[RealComponent]
type = MFEMMassKernel
coefficient = massCoef
[]
[ImagComponent]
type = MFEMMassKernel
coefficient = lossCoef
[]
[]
[]
[Solver]
type = MFEMSuperLU
[]
[Executioner]
type = MFEMSteady
assembly_level = legacy
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/Complex2DQuad
vtk_format = ASCII
[]
[]
(test/tests/mfem/ics/transient_scalar_ic.i)
[Mesh]
type = MFEMMesh
file = ../mesh/cylinder-hex-q2.gen
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[L2FESpace]
type = MFEMScalarFESpace
fec_type = L2
fec_order = CONSTANT
basis = GaussLegendre
[]
[]
[Variables]
[h1_scalar]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[l2_scalar]
type = MFEMVariable
fespace = L2FESpace
[]
[]
[Functions]
[height]
type = ParsedFunction
expression = 'z'
[]
[]
[ICs]
[l2_scalar_ic]
type = MFEMScalarIC
variable = l2_scalar
coefficient = 2.0
[]
[h1_scalar_ic]
type = MFEMScalarIC
variable = h1_scalar
coefficient = height
[]
[]
[Kernels]
[h1_laplacian]
type = MFEMDiffusionKernel
variable = h1_scalar
coefficient = 1.0
[]
[dh1_dt]
type = MFEMTimeDerivativeMassKernel
variable = h1_scalar
coefficient = 1.0
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = h1_scalar
boundary = '1'
coefficient = height
[]
[top_dirichlet]
type = MFEMScalarDirichletBC
variable = h1_scalar
boundary = '2'
coefficient = height
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
device = cpu
dt = 2.0
start_time = 0.0
end_time = 2.0
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/TransientScalarIC
vtk_format = ASCII
[]
[]
(test/tests/mfem/transfers/mfem_sub_mfem_sub/sub_send.i)
[Mesh]
type = MFEMMesh
file = ../../mesh/square.msh
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[send]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[BCs]
[back]
type = MFEMScalarDirichletBC
variable = send
boundary = 1
coefficient = 1.0
[]
[bottom]
type = MFEMScalarDirichletBC
variable = send
boundary = 2
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = send
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/DiffusionSendApp
vtk_format = ASCII
[]
[]
[Executioner]
type = MFEMSteady
[]
(test/tests/mfem/submeshes/cut_closed_coil.i)
# Solve for the electric field on a closed conductor subject to
# global loop voltage constraint.
initial_coil_domains = 'TorusCore TorusSheath'
coil_cut_surface = 'Cut'
coil_loop_voltage = -1.0
coil_conductivity = 1.0
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/embedded_concentric_torus.e
[]
[FunctorMaterials]
[Conductor]
type = MFEMGenericFunctorMaterial
prop_names = conductivity
prop_values = ${coil_conductivity}
[]
[]
[ICs]
[coil_external_potential_ic]
type = MFEMScalarBoundaryIC
variable = coil_external_potential
boundary = ${coil_cut_surface}
coefficient = ${coil_loop_voltage}
[]
[]
[SubMeshes]
[cut]
type = MFEMCutTransitionSubMesh
cut_boundary = ${coil_cut_surface}
block = ${initial_coil_domains}
transition_subdomain = transition_dom
transition_subdomain_boundary = transition_bdr
closed_subdomain = coil_dom
[]
[coil]
type = MFEMDomainSubMesh
block = coil_dom
[]
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[CoilH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = coil
[]
[CoilHCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
submesh = coil
[]
[TransitionH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = cut
[]
[TransitionHCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
submesh = cut
[]
[]
[Variables]
[coil_induced_potential]
type = MFEMVariable
fespace = CoilH1FESpace
[]
[]
[AuxVariables]
[coil_external_potential]
type = MFEMVariable
fespace = CoilH1FESpace
[]
[transition_external_potential]
type = MFEMVariable
fespace = TransitionH1FESpace
[]
[transition_external_e_field]
type = MFEMVariable
fespace = TransitionHCurlFESpace
[]
[induced_potential]
type = MFEMVariable
fespace = H1FESpace
[]
[induced_e_field]
type = MFEMVariable
fespace = HCurlFESpace
[]
[external_e_field]
type = MFEMVariable
fespace = HCurlFESpace
[]
[e_field]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[update_induced_e_field]
type = MFEMGradAux
variable = induced_e_field
source = induced_potential
scale_factor = -1.0
execute_on = TIMESTEP_END
[]
[update_external_e_field]
type = MFEMGradAux
variable = transition_external_e_field
source = transition_external_potential
scale_factor = -1.0
execute_on = TIMESTEP_END
[]
[update_total_e_field]
type = MFEMSumAux
variable = e_field
source_variables = 'induced_e_field external_e_field'
execute_on = TIMESTEP_END
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = coil_induced_potential
coefficient = conductivity
[]
[source]
type = MFEMMixedGradGradKernel
trial_variable = coil_external_potential
variable = coil_induced_potential
coefficient = conductivity
block = 'transition_dom'
[]
[]
[Solver]
type = MFEMSuperLU
[]
[Executioner]
type = MFEMSteady
[]
[Transfers]
[submesh_transfer_from_coil]
type = MFEMSubMeshTransfer
from_variable = coil_induced_potential
to_variable = induced_potential
execute_on = TIMESTEP_END
[]
[submesh_transfer_to_transition]
type = MFEMSubMeshTransfer
from_variable = coil_external_potential
to_variable = transition_external_potential
execute_on = TIMESTEP_END
[]
[submesh_transfer_from_transition]
type = MFEMSubMeshTransfer
from_variable = transition_external_e_field
to_variable = external_e_field
execute_on = TIMESTEP_END
[]
[]
[Outputs]
[GlobalParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/WholePotentialCoil
vtk_format = ASCII
[]
[TransitionParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/CutPotentialCoil
vtk_format = ASCII
submesh = cut
[]
[CoilParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/Coil
vtk_format = ASCII
submesh = coil
[]
[]
(test/tests/mfem/timesteppers/mfem_multiple_timesequences.i)
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
coefficient = 0.1
[]
[time]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
device = cpu
end_time = 0.8
# Use as many different time sequence steppers as we could to test the compositionDT
[TimeSteppers]
[ConstDT1]
type = ConstantDT
dt = 0.2
[]
[ConstDT2]
type = ConstantDT
dt = 0.1
[]
[LogConstDT]
type = LogConstantDT
log_dt = 0.2
first_dt = 0.1
[]
[Timesequence1]
type = TimeSequenceStepper
time_sequence = '0 0.25 0.3 0.5 0.8'
[]
[Timesequence2]
type = CSVTimeSequenceStepper
file_name = timesequence.csv
column_name = time
[]
[Timesequence3]
type = ExodusTimeSequenceStepper
mesh = timesequence.e
[]
[]
[]
[Postprocessors]
[timestep]
type = TimePostprocessor
execute_on = 'timestep_end'
[]
[]
[Outputs]
csv = true
file_base='mfem_multiple_timesequences'
[]
(test/tests/mfem/kernels/diffusion_eigenproblem.i)
[Mesh]
type = MFEMMesh
file = ../mesh/star.mesh
dim = 2
serial_refine = 1
[]
[Problem]
type = MFEMEigenproblem
num_modes = 5
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[BCs]
[all]
type = MFEMScalarDirichletBC
variable = u
coefficient = 1.0
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
print_level = 0
[]
[]
[Solver]
type = MFEMHypreLOBPCG
preconditioner = boomeramg
print_level = 0
l_tol = 1e-10
l_max_its = 300
random_seed = 75
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[VectorPostprocessors]
[eigenvalues]
type = MFEMEigenvaluesPostprocessor
[]
[]
[Outputs]
[ReportedPostprocessors]
type = CSV
file_base = OutputData/DiffusionEigenproblem
[]
[]
(test/tests/mfem/transfers/h1_libmesh_parent_mfem_sub/mfem_sub_scalar.i)
[Mesh]
type = MFEMMesh
file = ../../mesh/square_quad9.e
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[mfem_scalar_var]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[BCs]
[sides]
type = MFEMScalarDirichletBC
variable = mfem_scalar_var
coefficient = 1.0
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = mfem_scalar_var
[]
[source]
type = MFEMDomainLFKernel
variable = mfem_scalar_var
coefficient = 2.0
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
(test/tests/mfem/auxkernels/projection.i)
[Mesh]
type = MFEMMesh
file = ../mesh/hinomaru.e
dim = 2
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[L2FESpace]
type = MFEMScalarFESpace
fec_type = L2
fec_order = CONSTANT
basis = GaussLegendre
[]
[]
[Variables]
[Az]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[J]
type = MFEMVariable
fespace = L2FESpace
[]
[GAz]
type = MFEMVariable
fespace = HCurlFESpace
[]
[GAz(copy)]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[Kernels]
[diffusion]
type = MFEMDiffusionKernel
variable = Az
[]
[source]
type = MFEMDomainLFKernel
variable = Az
coefficient = J_source
[]
[]
[AuxKernels]
[J]
type = MFEMScalarProjectionAux
variable = J
coefficient = J_source
[]
[GAz]
type = MFEMGradAux
variable = GAz
source = Az
[]
[GAz(copy)]
type = MFEMVectorProjectionAux
variable = GAz(copy)
vector_coefficient = GAz
[]
[]
[BCs]
[essential]
type = MFEMScalarDirichletBC
variable = Az
boundary = outer
coefficient = 1
[]
[]
[FunctorMaterials]
[J_wire]
type = MFEMGenericFunctorMaterial
prop_names = J_source
prop_values = 8.0
block = wire
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-16
[]
[Executioner]
type = MFEMSteady
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/Projection
vtk_format = ASCII
[]
[]
(test/tests/mfem/kernels/diffusion_amr.i)
[Mesh]
type = MFEMMesh
file = ../mesh/square.msh
nonconforming = true
[]
[Adaptivity]
[Indicators]
[l2zz]
type = MFEML2ZienkiewiczZhuIndicator
variable = concentration
kernel = diff
[]
[]
[Markers]
[ref]
type = MFEMRefinementMarker
threshold = 0.7
indicator = l2zz
max_h_level = 1
[]
[]
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[]
[Variables]
[concentration]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[concentration_gradient]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[grad]
type = MFEMGradAux
variable = concentration_gradient
source = concentration
execute_on = TIMESTEP_END
[]
[]
[BCs]
[top]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 4
coefficient = 1
[]
[bottom]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 2
[]
[]
[Functions]
[D]
type = ParsedFunction
expression = 1+1/(1+exp(20*y-10))
[]
[solution]
type = ParsedFunction
expression = (20*y+log(exp(20*y)+2*exp(10))-log(1+2*exp(10)))/(30+log(2+exp(10))-log(1+2*exp(10)))
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = concentration
coefficient = D
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Postprocessors]
[error]
type = MFEML2Error
variable = concentration
function = solution
[]
[]
[Outputs]
csv = true
file_base = OutputData/DiffusionHRefinement
[]
(test/tests/mfem/transfers/mfem_parent_mfem_sub/sub_complex.i)
[Mesh]
type = MFEMMesh
file = ../../mesh/square.msh
[]
[Problem]
type = MFEMProblem
numeric_type = complex
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMComplexVariable
fespace = H1FESpace
[]
[]
[BCs]
[bottom]
type = MFEMComplexScalarDirichletBC
variable = u
boundary = 2
coefficient_real = 1
coefficient_imag = 1
[]
[top]
type = MFEMComplexScalarDirichletBC
variable = u
boundary = 4
[]
[]
[Kernels]
[diff]
type = MFEMComplexKernel
variable = u
[RealComponent]
type = MFEMDiffusionKernel
[]
[ImagComponent]
type = MFEMDiffusionKernel
[]
[]
[]
[Solver]
type = MFEMSuperLU
[]
[Executioner]
type = MFEMSteady
[]
[MultiApps]
active = ''
[subapp]
type = FullSolveMultiApp
input_files = parent_complex.i
execute_on = FINAL
[]
[]
[Transfers]
active = ''
[to_sub]
type = MultiAppMFEMCopyTransfer
source_variables = u
variables = u
to_multi_app = subapp
[]
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/DiffusionSubComplex
vtk_format = ASCII
[]
[]
(test/tests/mfem/vectorpostprocessors/point_value_sampler/point_value_sampler_diffusion.i)
# MFEM diffusion problem sampled with MFEMPointValueSampler.
[Mesh]
type = MFEMMesh
file = ../../mesh/mug.e
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[]
[Variables]
[concentration]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[concentration_gradient]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[grad]
type = MFEMGradAux
variable = concentration_gradient
source = concentration
execute_on = TIMESTEP_END
[]
[]
[ICs]
[diffused_ic]
type = MFEMScalarIC
coefficient = one
variable = concentration
[]
[]
[Functions]
[one]
type = ParsedFunction
expression = 1.0
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'bottom'
coefficient = 1.0
[]
[top]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'top'
[]
[]
[FunctorMaterials]
[Substance]
type = MFEMGenericFunctorMaterial
prop_names = diffusivity
prop_values = 1.0
block = 'the_domain'
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = concentration
coefficient = diffusivity
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[jacobi]
type = MFEMOperatorJacobiSmoother
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[VectorPostprocessors]
[point_sample]
type = MFEMPointValueSampler
variable = 'concentration'
points = '2.125 0 -1.375 2.125 0 1.125'
[]
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Outputs]
execute_on = 'timestep_end'
csv = true
[]
(test/tests/mfem/timesteppers/mfem_multiple_timesteppers.i)
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
coefficient = 0.1
[]
[time]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[Functions]
[dts]
type = PiecewiseLinear
x = '0 0.85 2'
y = '0.2 0.15 0.2'
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
device = cpu
end_time = 0.8
# Use as many different time steppers as we could to test the compositionDT,
# SolutionTimeAdaptiveDT give slightly different dt per run, set rel_err = 1e-2
# to ensure the test won't fail due to the small difference in the high-digit.
[TimeSteppers]
[ConstDT1]
type = ConstantDT
dt = 0.2
[]
[FunctionDT]
type = FunctionDT
function = dts
[]
[LogConstDT]
type = LogConstantDT
log_dt = 0.2
first_dt = 0.1
[]
[IterationAdapDT]
type = IterationAdaptiveDT
dt = 0.5
[]
[Timesequence]
type = TimeSequenceStepper
time_sequence = '0 0.25 0.3 0.5 0.8'
[]
[]
[]
[Postprocessors]
[timestep]
type = TimePostprocessor
execute_on = 'timestep_end'
[]
[]
[Outputs]
csv = true
file_base='mfem_multiple_timesteppers'
[]
(test/tests/mfem/multiapps/sub_cycling_sub.i)
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[td]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
num_steps = 2
dt = 0.01
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/sub_cycling_sub
vtk_format = ASCII
[]
[]
(test/tests/mfem/variables/mfem_variables_from_moose.i)
[Mesh]
type = MFEMMesh
file = ../mesh/mug.e
dim = 3
[]
[Problem]
type = MFEMProblem
[]
[Variables]
[scalar_var]
family = LAGRANGE
order = FIRST
[]
[vector_var]
family = LAGRANGE_VEC
order = FIRST
[]
[]
[AuxVariables]
[scalar_auxvar]
family = MONOMIAL
order = CONSTANT
[]
[vector_auxvar]
family = MONOMIAL_VEC
order = CONSTANT
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = scalar_var
boundary = '1'
coefficient = 1.0
[]
[top]
type = MFEMScalarDirichletBC
variable = scalar_var
boundary = '2'
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = scalar_var
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMTransient
device = cpu
dt = 1.0
start_time = 0.0
end_time = 1.0
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/VariableSetupTest
[]
[]
(test/tests/mfem/functions/parsed_function_source.i)
[Mesh]
type = MFEMMesh
file = ../mesh/hinomaru.e
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[variable]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[ICs]
[ic]
type = MFEMScalarIC
variable = variable
coefficient = material
[]
[]
[BCs]
[bc]
type = MFEMScalarDirichletBC
variable = variable
boundary = skin
[]
[]
[FunctorMaterials]
[material]
type = MFEMGenericFunctorMaterial
prop_names = material
prop_values = -100
[]
[]
[Functions]
[r]
type = ParsedFunction
expression = hypot(x,y)
[]
[p]
type = ParsedFunction
expression = atan2(y,x)
[]
[source]
type = MFEMParsedFunction
expression = v*sin(w*p)
symbol_names = 'p w v'
symbol_values = 'p 4 variable'
[]
[solution]
type = MFEMParsedFunction
expression = if(r<=1,-c*sin(w*p)*(r^w-r^2)/(w^2-4),0)
symbol_names = 'r p w c'
symbol_values = 'r p 4 material'
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = variable
[]
[source]
type = MFEMDomainLFKernel
variable = variable
coefficient = source
block = wire
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-16
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Postprocessors]
[error]
type = MFEML2Error
variable = variable
function = solution
[]
[]
[Outputs]
csv = true
file_base = OutputData/ParsedFunctionSource
[]
(test/tests/mfem/submeshes/domain_submesh_transfer.i)
[Mesh]
type = MFEMMesh
file = ../mesh/cylinder-hex-q2.gen
[]
[Problem]
type = MFEMProblem
[]
[SubMeshes]
[wire]
type = MFEMDomainSubMesh
block = interior
[]
[]
[FESpaces]
[SubMeshH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = wire
[]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[submesh_potential]
type = MFEMVariable
fespace = SubMeshH1FESpace
[]
[]
[AuxVariables]
[potential]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[BCs]
[top]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = front
coefficient = 1.0
[]
[bottom]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = back
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = submesh_potential
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Transfers]
[submesh_transfer]
type = MFEMSubMeshTransfer
from_variable = submesh_potential
to_variable = potential
[]
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/DomainPotentialTransfer
vtk_format = ASCII
[]
[]
(test/tests/mfem/multiapps/dt_from_parent.i)
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[td]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
device = cpu
num_steps = 10
dt = 0.2
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/dt_from_parent
vtk_format = ASCII
[]
[]
[MultiApps]
[sub_app]
type = TransientMultiApp
app_type = MooseTestApp
input_files = 'dt_from_parent_sub.i'
[]
[]
(test/tests/mfem/vectorpostprocessors/line_value_sampler/line_value_sampler_diffusion.i)
# MFEM diffusion problem sampled with MFEMLineValueSampler.
[Mesh]
type = MFEMMesh
file = ../../mesh/mug.e
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[]
[Variables]
[concentration]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[concentration_gradient]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[grad]
type = MFEMGradAux
variable = concentration_gradient
source = concentration
execute_on = TIMESTEP_END
[]
[]
[ICs]
[diffused_ic]
type = MFEMScalarIC
coefficient = one
variable = concentration
[]
[]
[Functions]
[one]
type = ParsedFunction
expression = 1.0
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'bottom'
coefficient = 1.0
[]
[top]
type = MFEMScalarDirichletBC
variable = concentration
boundary = 'top'
[]
[]
[FunctorMaterials]
[Substance]
type = MFEMGenericFunctorMaterial
prop_names = diffusivity
prop_values = 1.0
block = 'the_domain'
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = concentration
coefficient = diffusivity
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[jacobi]
type = MFEMOperatorJacobiSmoother
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[VectorPostprocessors]
[line_sample]
type = MFEMLineValueSampler
variable = 'concentration'
start_point = '2.125 0 -2.375'
end_point = '2.125 0 2.625'
num_points = 11
[]
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Outputs]
execute_on = 'timestep_end'
csv = true
[]
(test/tests/mfem/multiapps/dt_from_parent_sub.i)
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[td]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
num_steps = 10
dt = 1 # This will be constrained by the parent solve
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/dt_from_parent_sub
vtk_format = ASCII
[]
[]
(test/tests/mfem/transfers/mfem_parent_mfem_sub/mfem_sub_embedded_submesh.i)
[Mesh]
type = MFEMMesh
file = ../../mesh/cylinder-hex-q2.gen
[]
[Problem]
type = MFEMProblem
[]
[SubMeshes]
[wire]
type = MFEMDomainSubMesh
block = interior
[]
[]
[FESpaces]
[SubMeshH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = wire
[]
[]
[Variables]
[submesh_potential]
type = MFEMVariable
fespace = SubMeshH1FESpace
[]
[]
[BCs]
[top]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = front
coefficient = 1.0
[]
[bottom]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = back
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = submesh_potential
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
[]
(test/tests/mfem/multiapps/full_solve_sub.i)
[Problem]
type = MFEMProblem
verbose_multiapps = true
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[td]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
print_level = 0
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
print_level = 0
[]
[Executioner]
type = MFEMTransient
num_steps = 2
dt = 0.01
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/full_solve_sub
vtk_format = ASCII
[]
[]
(test/tests/mfem/submeshes/hphi_magnetostatic.i)
# Solve for the magnetic field around a closed conductor subject to
# global current constraint.
initial_vacuum_domains = 'Exterior'
vacuum_cut_surface = 'Cut'
conductor_current = 1.0
vacuum_permeability = 1.0
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/split_embedded_concentric_torus.e
[]
[FunctorMaterials]
[Conductor]
type = MFEMGenericFunctorMaterial
prop_names = permeability
prop_values = ${vacuum_permeability}
[]
[]
[ICs]
[vacuum_cut_potential_ic]
type = MFEMScalarBoundaryIC
variable = vacuum_cut_potential
boundary = ${vacuum_cut_surface}
coefficient = ${conductor_current}
[]
[]
[SubMeshes]
[cut]
type = MFEMCutTransitionSubMesh
cut_boundary = ${vacuum_cut_surface}
block = ${initial_vacuum_domains}
transition_subdomain = transition_dom
transition_subdomain_boundary = transition_bdr
closed_subdomain = vacuum_dom
[]
[vacuum]
type = MFEMDomainSubMesh
block = vacuum_dom
[]
[]
[FESpaces]
[VacuumH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = vacuum
[]
[VacuumHCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
submesh = vacuum
[]
[TransitionH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = cut
[]
[TransitionHCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
submesh = cut
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
[]
[Variables]
[vacuum_magnetic_potential]
type = MFEMVariable
fespace = VacuumH1FESpace
[]
[]
[AuxVariables]
[vacuum_cut_potential]
type = MFEMVariable
fespace = VacuumH1FESpace
[]
[transition_cut_potential]
type = MFEMVariable
fespace = TransitionH1FESpace
[]
[transition_cut_function_field]
type = MFEMVariable
fespace = TransitionHCurlFESpace
[]
[background_h_field]
type = MFEMVariable
fespace = VacuumHCurlFESpace
[]
[cut_function_field]
type = MFEMVariable
fespace = VacuumHCurlFESpace
[]
[vacuum_h_field]
type = MFEMVariable
fespace = VacuumHCurlFESpace
[]
[h_field]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[AuxKernels]
[update_background_h_field]
type = MFEMGradAux
variable = background_h_field
source = vacuum_magnetic_potential
scale_factor = -1.0
execute_on = TIMESTEP_END
[]
[update_transition_cut_function_field]
type = MFEMGradAux
variable = transition_cut_function_field
source = transition_cut_potential
scale_factor = -1.0
execute_on = TIMESTEP_END
[]
[update_total_h_field]
type = MFEMSumAux
variable = vacuum_h_field
source_variables = 'background_h_field cut_function_field'
execute_on = TIMESTEP_END
[]
[]
[BCs]
# Set zero of magnetic potential on symmetry plane
[Exterior]
type = MFEMScalarDirichletBC
variable = vacuum_magnetic_potential
boundary = 'Cut'
coefficient = 0.0
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = vacuum_magnetic_potential
coefficient = permeability
[]
[source]
type = MFEMMixedGradGradKernel
trial_variable = vacuum_cut_potential
variable = vacuum_magnetic_potential
coefficient = permeability
block = 'transition_dom'
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMSteady
[]
[Transfers]
[submesh_transfer_to_transition]
type = MFEMSubMeshTransfer
from_variable = vacuum_cut_potential
to_variable = transition_cut_potential
execute_on = TIMESTEP_END
[]
[submesh_transfer_from_transition]
type = MFEMSubMeshTransfer
from_variable = transition_cut_function_field
to_variable = cut_function_field
execute_on = TIMESTEP_END
[]
[submesh_transfer_from_vacuum]
type = MFEMSubMeshTransfer
from_variable = vacuum_h_field
to_variable = h_field
execute_on = TIMESTEP_END
[]
[]
[Postprocessors]
[MagneticEnergy]
type = MFEMVectorFEInnerProductIntegralPostprocessor
coefficient = ${fparse 0.5*vacuum_permeability}
dual_variable = vacuum_h_field
primal_variable = vacuum_h_field
block = 'Exterior'
[]
[]
[Outputs]
[ReportedPostprocessors]
type = CSV
file_base = OutputData/HPhiMagnetostaticClosedCoilCSV
[]
[VacuumParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/HPhiMagnetostaticClosedCoil
vtk_format = ASCII
submesh = vacuum
[]
[]
(test/tests/mfem/kernels/heattransfer.i)
[Mesh]
type = MFEMMesh
file = ../mesh/mug.e
dim = 3
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[temperature]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
inactive = average_temperature
[average_temperature]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxKernels]
inactive = average_field
[average_field]
type = MFEMScalarTimeAverageAux
variable = average_temperature
source = temperature
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = temperature
[]
[dT_dt]
type = MFEMTimeDerivativeMassKernel
variable = temperature
[]
[]
[BCs]
active = 'bottom top_convective'
[bottom]
type = MFEMScalarDirichletBC
variable = temperature
boundary = '1'
coefficient = 1.0
[]
[top_convective]
type = MFEMConvectiveHeatFluxBC
variable = temperature
boundary = '2'
T_infinity = .5
heat_transfer_coefficient = 5
[]
[top_dirichlet]
type = MFEMScalarDirichletBC
variable = temperature
boundary = '2'
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[jacobi]
type = MFEMOperatorJacobiSmoother
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMTransient
device = cpu
assembly_level = legacy
dt = 2.0
start_time = 0.0
end_time = 6.0
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/HeatTransfer
vtk_format = ASCII
[]
[]
(test/tests/mfem/kernels/nl_heatconduction.i)
# Implementation of MFEM Example 16, for a time dependent nonlinear heat equation problem of the
# form
# dT/dt = \nabla \cdot (\kappa + \alpha T) \nabla T
kappa = 0.5
alpha = 1e-2
[Mesh]
type = MFEMMesh
file = ../mesh/star.mesh
uniform_refine = 1
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = SECOND
[]
[]
[Variables]
[temperature]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
inactive = average_temperature
[average_temperature]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxKernels]
inactive = average_field
[average_field]
type = MFEMScalarTimeAverageAux
variable = average_temperature
source = temperature
[]
[]
[Functions]
[initial]
type = ParsedFunction
expression = 'if((x*x + y*y > 0.251), 1.0, 2.0)'
[]
[diffusivity_temperature_dependence]
type = MFEMParsedFunction
expression = 'alpha * temperature'
symbol_names = 'alpha temperature'
symbol_values = '${alpha} temperature'
[]
[]
[ICs]
[diffused_ic]
type = MFEMScalarIC
coefficient = initial
variable = temperature
[]
[]
[Kernels]
[nl_diffusion]
type = MFEMNLDiffusionKernel
variable = temperature
k_coefficient = diffusivity_temperature_dependence
dk_du_coefficient = ${alpha}
[]
[linear_diffusion]
type = MFEMDiffusionKernel
variable = temperature
coefficient = ${kappa}
[]
[dT_dt]
type = MFEMTimeDerivativeMassKernel
variable = temperature
[]
[]
[Solver]
type = MFEMMUMPS
print_level = 0
[]
[Executioner]
type = MFEMTransient
device = cpu
assembly_level = legacy
dt = 1e-2
start_time = 0.0
end_time = 0.5
nl_max_its = 30
nl_abs_tol = 1.0e-5
nl_rel_tol = 1.0e-5
print_level = 1
[]
[VectorPostprocessors]
[centre_temperature]
type = MFEMPointValueSampler
variable = 'temperature'
points = '0.0 0.0 0.0'
execute_on = TIMESTEP_END
[]
[]
[Outputs]
file_base = OutputData/NLHeatConduction
csv = true
time_step_interval = 10
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/NLHeatConduction
vtk_format = ASCII
[]
[]
(test/tests/mfem/submeshes/domain_submesh.i)
[Mesh]
type = MFEMMesh
file = ../mesh/cylinder-hex-q2.gen
[]
[Problem]
type = MFEMProblem
[]
[SubMeshes]
[wire]
type = MFEMDomainSubMesh
block = interior
[]
[]
[FESpaces]
[SubMeshH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = wire
[]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[submesh_potential]
type = MFEMVariable
fespace = SubMeshH1FESpace
[]
[]
[BCs]
[top]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = front
coefficient = 1.0
[]
[bottom]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = back
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = submesh_potential
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/DomainPotential
vtk_format = ASCII
submesh = wire
[]
[]
(test/tests/mfem/kernels/nl_heattransfer.i)
[Problem]
type = MFEMProblem
[]
[Mesh]
type = MFEMMesh
file = ../mesh/stacked_hexes.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[temperature]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[ICs]
[temperature_ic]
type = MFEMScalarIC
coefficient = 200.0
variable = temperature
[]
[]
[Functions]
[T_inf]
type = MFEMParsedFunction
expression = 'temperature + 1'
symbol_names = 'temperature'
symbol_values = 'temperature'
[]
[htc]
type = MFEMParsedFunction
expression = 'temperature/100 + 1'
symbol_names = 'temperature'
symbol_values = 'temperature'
[]
[dhtc_dT]
type = MFEMParsedFunction
expression = '1 / 100'
symbol_names = 'temperature'
symbol_values = 'temperature'
[]
[]
[Kernels]
[dT_dt]
type = MFEMTimeDerivativeMassKernel
variable = temperature
[]
[diffusion]
type = MFEMDiffusionKernel
variable = temperature
[]
[]
[BCs]
active = nonlinear
[nonlinear]
type = MFEMNLConvectiveHeatFluxBC
variable = temperature
boundary = 'right'
T_infinity = T_inf
heat_transfer_coefficient = htc
d_heat_transfer_dT_coefficient = dhtc_dT
[]
[linearized]
type = MFEMNLConvectiveHeatFluxBC
variable = temperature
boundary = 'right'
T_infinity = 201.0
heat_transfer_coefficient = 3.0
d_heat_transfer_dT_coefficient = 0.0
[]
[]
[VectorPostprocessors]
[line_sample]
type = MFEMLineValueSampler
variable = 'temperature'
start_point = '0.0 0.5 0.5'
end_point = '1.0 0.5 0.5'
num_points = 3
execute_on = TIMESTEP_END
[]
[]
[Solver]
type = MFEMMUMPS
print_level = 0
[]
[Executioner]
type = MFEMTransient
device = cpu
assembly_level = legacy
dt = 1
num_steps = 3
nl_max_its = 150
nl_abs_tol = 1e-12
print_level = 1
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/NLHeatTransfer
vtk_format = ASCII
[]
[CSV]
type = CSV
file_base = OutputData/NLHeatTransfer
time_step_interval = 3
[]
[]
(test/tests/mfem/kernels/irrotational.i)
# 2D irrotational vortex with Nedelec elements of the first kind.
centre_x = -0.75
centre_y = 0.1
[Mesh]
type = MFEMMesh
file = ../mesh/vortex.msh
dim = 2
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = SEVENTH
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = SEVENTH
[]
[]
[Variables]
[velocity_potential]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[AuxVariables]
[velocity]
type = MFEMVariable
fespace = HCurlFESpace
[]
[]
[Functions]
[speed]
type = ParsedFunction
expression = '1 / sqrt((x-x0)^2 + (y-y0)^2)'
symbol_names = 'x0 y0'
symbol_values = '${centre_x} ${centre_y}'
[]
[theta]
type = ParsedFunction
expression = 'atan2(y-y0, x-x0)'
symbol_names = 'x0 y0'
symbol_values = '${centre_x} ${centre_y}'
[]
[exact_velocity]
type = ParsedVectorFunction
expression_x = '-v * sin(th)'
expression_y = 'v * cos(th)'
symbol_names = 'v th'
symbol_values = 'speed theta'
[]
[]
[BCs]
[potential_velocity_boundary]
type = MFEMScalarDirichletBC
variable = velocity_potential
boundary = '1'
coefficient = theta
[]
[]
[Kernels]
[laplacian]
type = MFEMDiffusionKernel
variable = velocity_potential
[]
[]
[AuxKernels]
[grad]
type = MFEMGradAux
variable = velocity
source = velocity_potential
execute_on = TIMESTEP_END
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[Postprocessors]
[potential_error]
type = MFEML2Error
variable = velocity_potential
function = theta
[]
[velocity_error]
type = MFEMVectorL2Error
variable = velocity
function = exact_velocity
[]
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/Irrotational
vtk_format = ASCII
[]
[L2CSV]
type = CSV
file_base = OutputData/Irrotational
[]
[]
(test/tests/mfem/auxkernels/2Dmagnetostatic.i)
[Mesh]
type = MFEMMesh
file = ../mesh/hinomaru.e
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[HCurlFESpace]
type = MFEMVectorFESpace
fec_type = ND
fec_order = FIRST
[]
#For compatible pairing H1 order p -> ND order p -> RT order p-1
[RTFESpace]
type = MFEMVectorFESpace
fec_type = RT
fec_order = CONSTANT
[]
[L2FESpace]
type = MFEMScalarFESpace
fec_type = L2
fec_order = CONSTANT
basis = GaussLegendre
[]
[]
[Variables]
[Az]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[FunctorMaterials]
[J_wire]
type = MFEMGenericFunctorMaterial
prop_names = J_source
prop_values = 8.0
block = wire
[]
[]
[AuxVariables]
[J]
type = MFEMVariable
fespace = L2FESpace
[]
[gradAz]
type = MFEMVariable
fespace = HCurlFESpace
[]
[B]
type = MFEMVariable
fespace = RTFESpace
[]
[]
[Kernels]
[diffusion]
type = MFEMDiffusionKernel
variable = Az
[]
[source]
type = MFEMDomainLFKernel
variable = Az
coefficient = J_source
[]
[]
[AuxKernels]
[J]
type = MFEMScalarProjectionAux
variable = J
coefficient = J_source
[]
[gradAz]
type = MFEMGradAux
variable = gradAz
source = Az
[]
[B_from_gradAz]
type = MFEMNDtoRTAux
variable = B
source = gradAz
scale_factor = 1.0
[]
[]
[BCs]
[essential]
type = MFEMScalarDirichletBC
variable = Az
boundary = outer
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
[]
[VectorPostprocessors]
[line_sample]
type = MFEMLineValueSampler
variable = 'B'
start_point = '0 2 0'
end_point = '0 -2 0'
num_points = 10
[]
[]
[Executioner]
type = MFEMSteady
[]
[Outputs]
[ReportedPostprocessors]
type = CSV
file_base = 2DMagnetostatic
[]
[]
(test/tests/mfem/multiapps/full_solve_parent.i)
[Problem]
type = MFEMProblem
verbose_multiapps = true
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[td]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
print_level = 0
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
print_level = 0
[]
[Executioner]
type = MFEMTransient
device = cpu
num_steps = 2
dt = 0.1
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/full_solve_parent
vtk_format = ASCII
[]
[]
[MultiApps]
[full_solve]
type = FullSolveMultiApp
app_type = MooseTestApp
execute_on = timestep_begin
input_files = full_solve_sub.i
keep_full_output_history = true
[]
[]
(test/tests/mfem/transfers/mfem_parent_mfem_sub/sub.i)
[Mesh]
type = MFEMMesh
file = ../../mesh/square.msh
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[BCs]
[bottom]
type = MFEMScalarDirichletBC
variable = u
boundary = 2
coefficient = 1.0
[]
[top]
type = MFEMScalarDirichletBC
variable = u
boundary = 4
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-16
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
[]
[MultiApps]
active = ''
[subapp]
type = FullSolveMultiApp
input_files = parent.i
execute_on = FINAL
[]
[]
[Transfers]
active = ''
[to_sub]
type = MultiAppMFEMCopyTransfer
source_variables = u
variables = u
to_multi_app = subapp
[]
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/DiffusionSub
vtk_format = ASCII
[]
[]
(test/tests/mfem/submeshes/open_coil_source.i)
[Mesh]
type = MFEMMesh
file = ../mesh/cylinder-hex-q2.gen
[]
[Problem]
type = MFEMProblem
[]
[SubMeshes]
[wire]
type = MFEMDomainSubMesh
block = 1
[]
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[SubMeshH1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
submesh = wire
[]
[]
[Variables]
[electric_potential]
type = MFEMVariable
fespace = H1FESpace
[]
[submesh_potential]
type = MFEMVariable
fespace = SubMeshH1FESpace
[]
[]
[BCs]
[high_terminal]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = '1'
coefficient = 1.0
[]
[low_terminal]
type = MFEMScalarDirichletBC
variable = submesh_potential
boundary = '2'
coefficient = 0.0
[]
[]
[FunctorMaterials]
[Substance]
type = MFEMGenericFunctorMaterial
prop_names = conductivity
prop_values = 1.0
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = submesh_potential
coefficient = conductivity
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-12
[]
[Executioner]
type = MFEMSteady
[]
[Transfers]
[submesh_potential_transfer]
type = MFEMSubMeshTransfer
from_variable = submesh_potential
to_variable = electric_potential
[]
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/OpenCoilSourceSubMesh
vtk_format = ASCII
submesh = wire
[]
[]
(test/tests/mfem/multiapps/sub_cycling_parent.i)
[Problem]
type = MFEMProblem
verbose_multiapps = true
[]
[Mesh]
type = MFEMMesh
file = ../mesh/square.e
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[u]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = u
[]
[td]
type = MFEMTimeDerivativeMassKernel
variable = u
[]
[]
[BCs]
[left]
type = MFEMScalarDirichletBC
variable = u
boundary = left
coefficient = 0
[]
[right]
type = MFEMScalarDirichletBC
variable = u
boundary = right
coefficient = 1
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[]
[Solver]
type = MFEMHyprePCG
preconditioner = boomeramg
l_tol = 1e-8
l_max_its = 100
[]
[Executioner]
type = MFEMTransient
device = cpu
num_steps = 2
dt = 0.1
[]
[Outputs]
[ParaViewDataCollection]
type = MFEMParaViewDataCollection
file_base = OutputData/sub_cycling_parent
vtk_format = ASCII
[]
[]
[MultiApps]
[sub]
type = TransientMultiApp
app_type = MooseTestApp
execute_on = timestep_end
positions = '0 0 0'
input_files = sub_cycling_sub.i
sub_cycling = true
[]
[]
(test/tests/mfem/transfers/h1_mfem_parent_libmesh_sub/mfem_parent_scalar.i)
[Mesh]
type = MFEMMesh
file = ../../mesh/square_quad9.e
[]
[Problem]
type = MFEMProblem
[]
[FESpaces]
[H1FESpace]
type = MFEMScalarFESpace
fec_type = H1
fec_order = FIRST
[]
[]
[Variables]
[mfem_scalar_var]
type = MFEMVariable
fespace = H1FESpace
[]
[libmesh_scalar_var]
type = MFEMVariable
fespace = H1FESpace
[]
[]
[BCs]
[sides]
type = MFEMScalarDirichletBC
variable = mfem_scalar_var
coefficient = 1.0
[]
[]
[Kernels]
[diff]
type = MFEMDiffusionKernel
variable = mfem_scalar_var
[]
[source]
type = MFEMDomainLFKernel
variable = mfem_scalar_var
coefficient = 2.0
[]
[]
[Preconditioner]
[boomeramg]
type = MFEMHypreBoomerAMG
[]
[jacobi]
type = MFEMOperatorJacobiSmoother
[]
[]
[Solver]
type = MFEMHypreGMRES
preconditioner = boomeramg
l_tol = 1e-12
l_max_its = 1000
[]
[Executioner]
type = MFEMSteady
device = cpu
[]
[MultiApps]
[libmesh_app]
type = FullSolveMultiApp
input_files = libmesh_sub_scalar.i
execute_on = 'INITIAL'
[]
[]
[Transfers]
[transfer_from_libmesh]
type = MultiApplibMeshToMFEMShapeEvaluationTransfer
source_variables = libmesh_scalar_var
variables = libmesh_scalar_var
from_multi_app = libmesh_app
[]
[]
[Postprocessors]
[Difference]
type = MFEML2Error
variable = mfem_scalar_var
function = libmesh_scalar_var
execute_on = TIMESTEP_END
[]
[]
[Outputs]
file_base = 'mfem_parent_libmesh_sub_scalar_quads'
csv = true
[]