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BCs System

Available Objects

Moose App
ADFunctionDirichletBC<JACOBIAN>Imposes the essential boundary condition $var element = document.getElementById("moose-equation-767839ab-cfc2-4524-96f5-fdb2cfe3df67");katex.render("u=g", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-dbd6ae2e-88f2-4375-b5e0-7ef4ba6ca982");katex.render("g", element, {displayMode:false,throwOnError:false});$ is calculated by a function.
ADFunctionDirichletBC<RESIDUAL>Imposes the essential boundary condition $var element = document.getElementById("moose-equation-38e34f2e-5cce-40cf-b4ff-686b343cff7c");katex.render("u=g", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-d4ea256e-e6b9-40bc-ba8f-5271a4bd1ee9");katex.render("g", element, {displayMode:false,throwOnError:false});$ is calculated by a function.
ADLagrangeVecFunctionDirichletBC<JACOBIAN>Imposes the essential boundary condition $var element = document.getElementById("moose-equation-6ff0556d-0a28-4cf6-8ef3-5e3d8e5aa080");katex.render("\\vec{u}=\\vec{g}", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-691c9472-02ab-4d66-bd93-8598df4be615");katex.render("\\vec{g}", element, {displayMode:false,throwOnError:false});$ components are calculated with functions.
ADLagrangeVecFunctionDirichletBC<RESIDUAL>Imposes the essential boundary condition $var element = document.getElementById("moose-equation-612871bc-433d-4c43-beab-0c5b9548b332");katex.render("\\vec{u}=\\vec{g}", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-0f002e90-2b1d-4bf2-af5e-35c5961c20d5");katex.render("\\vec{g}", element, {displayMode:false,throwOnError:false});$ components are calculated with functions.
ConvectiveFluxBCDetermines boundary values via the initial and final values, flux, and exposure duration
DGFunctionDiffusionDirichletBC
DiffusionFluxBCComputes a boundary residual contribution consistent with the Diffusion Kernel. Does not impose a boundary condition; instead computes the boundary contribution corresponding to the current value of grad(u) and accumulates it in the residual vector.
DirichletBCImposes the essential boundary condition $var element = document.getElementById("moose-equation-8eedd286-bc68-4bf5-87c7-dbc4853b9d58");katex.render("u=g", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-5101d771-f7f3-4a82-b10b-e17c27f6d284");katex.render("g", element, {displayMode:false,throwOnError:false});$ is a constant, controllable value.
EigenDirichletBCDirichlet BC for eigenvalue solvers
FunctionDirichletBCImposes the essential boundary condition $var element = document.getElementById("moose-equation-d063866a-44cf-4e6f-a5f6-d9aaabd89290");katex.render("u=g(t,\\vec{x})", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-530dc0fc-5969-4beb-9932-3d4eb059ef6d");katex.render("g", element, {displayMode:false,throwOnError:false});$ is a (possibly) time and space-dependent MOOSE Function.
FunctionNeumannBCImposes the integrated boundary condition $var element = document.getElementById("moose-equation-7c7d8780-9aea-4d5e-8044-ecf1c9066792");katex.render("\\frac{\\partial u}{\\partial n}=h(t,\\vec{x})", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-5870bec9-0462-4642-aad4-90d418a63647");katex.render("h", element, {displayMode:false,throwOnError:false});$ is a (possibly) time and space-dependent MOOSE Function.
FunctionPenaltyDirichletBC
FunctionPresetBCThe same as FunctionDirichletBC except the value is applied before the solve begins
LagrangeVecDirichletBCImposes the essential boundary condition $var element = document.getElementById("moose-equation-8b7adee3-e087-44a8-9093-87b350622bd3");katex.render("\\vec{u}=\\vec{g}", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-f0e85138-5a13-43f5-ace8-1e188ca81e81");katex.render("\\vec{g}", element, {displayMode:false,throwOnError:false});$ are constant, controllable values.
LagrangeVecFunctionDirichletBCImposes the essential boundary condition $var element = document.getElementById("moose-equation-cba54de4-5818-4724-b26e-058e0fa65bc5");katex.render("\\vec{u}=\\vec{g}", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-e0210369-89a1-4d14-81c1-a67c3d53bf04");katex.render("\\vec{g}", element, {displayMode:false,throwOnError:false});$ components are calculated with functions.
MatchedValueBCImplements a NodalBC which equates two different Variables' values on a specified boundary.
NeumannBCImposes the integrated boundary condition $var element = document.getElementById("moose-equation-bb83e00f-0576-4b50-ab85-41e252929e57");katex.render("\\frac{\\partial u}{\\partial n}=h", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-01c5ad19-d50a-4755-a555-733896190247");katex.render("h", element, {displayMode:false,throwOnError:false});$ is a constant, controllable value.
OneDEqualValueConstraintBC
PenaltyDirichletBCEnforces a Dirichlet boundary condition in a weak sense by penalizing differences between the current solution and the Dirichlet data.
PostprocessorDirichletBC
PostprocessorNeumannBC
PresetBCSimilar to DirichletBC except the value is applied before the solve begins
SinDirichletBCImposes a time-varying essential boundary condition $var element = document.getElementById("moose-equation-a4191d50-5885-4988-a7ed-8e63dbbce206");katex.render("u=g(t)", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-a4112826-ed4f-437a-addf-1a415e8feaa5");katex.render("g(t)", element, {displayMode:false,throwOnError:false});$ varies from an given initial value at time $var element = document.getElementById("moose-equation-ab7dcbb2-fbb4-4aa1-b967-4c5233a98c43");katex.render("t=0", element, {displayMode:false,throwOnError:false});$ to a given final value over a specified duration.
SinNeumannBCImposes a time-varying flux boundary condition $var element = document.getElementById("moose-equation-e3acb81e-6e26-4986-8089-bbb90ec79224");katex.render("\\frac{\\partial u}{\\partial n}=g(t)", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-ebab3fce-75a6-40d4-a17d-ca43945b8112");katex.render("g(t)", element, {displayMode:false,throwOnError:false});$ varies from an given initial value at time $var element = document.getElementById("moose-equation-fb15ae27-a162-44dc-9487-ee5de057272f");katex.render("t=0", element, {displayMode:false,throwOnError:false});$ to a given final value over a specified duration.
VacuumBC
VectorNeumannBCImposes the integrated boundary condition $var element = document.getElementById("moose-equation-168a0c64-2bb9-4f14-bb19-fa68fbe3805a");katex.render("\\frac{\\partial u}{\\partial n}=\\vec{V}\\cdot\\hat{n}", element, {displayMode:false,throwOnError:false});$ , where $var element = document.getElementById("moose-equation-d3e22489-2290-496b-9888-109c416d0b0d");katex.render("\\vec{V}", element, {displayMode:false,throwOnError:false});$ is a user-defined, constant vector.
WeakGradientBCComputes a boundary residual contribution consistent with the Diffusion Kernel. Does not impose a boundary condition; instead computes the boundary contribution corresponding to the current value of grad(u) and accumulates it in the residual vector.
Rdg App
AEFVBCA boundary condition kernel for the advection equation using a cell-centered finite volume method.
Functional Expansion Tools App
FXFluxBCSets a flux boundary condition, evaluated using a FunctionSeries instance. This does not fix the flux, but rather 'strongly encourages' flux agreement by penalizing the differences through contributions to the residual.
FXValueBCImposes a fixed value boundary condition, evaluated using a FunctionSeries instance.
FXValuePenaltyBCSets a value boundary condition, evaluated using a FunctionSeries instance. This does not fix the value, but rather 'strongly encourages' value agreement by penalizing the differences through contributions to the residual.
XFEMApp
CrackTipEnrichmentCutOffBCSimilar to DirichletBC except the value is applied before the solve begins
Heat Conduction App
ConvectiveFluxFunctionDetermines boundary value by fluid heat transfer coefficient and far-field temperature
CoupledConvectiveFlux
CoupledConvectiveHeatFluxBCConvective heat transfer boundary condition with temperature and heat transfer coefficent given by auxiliary variables.
GapHeatTransferTransfers heat across a gap between two surfaces dependant on the gap geometry specified.
HeatConductionBC
Richards App
Q2PPiecewiseLinearSinkSink of fluid, controlled by (pressure, bare_fluxes) interpolation. This is for use in Q2P models
RichardsExcavAllows the user to set variable values at the face of an excavation. You must have defined the excavation start time, start position, etc, through the excav_geom_function
RichardsHalfGaussianSink
RichardsPiecewiseLinearSink
Tensor Mechanics App
CoupledPressureBCApplies a pressure from a variable on a given boundary in a given direction
DashpotBC
DisplacementAboutAxisImplements a boundary condition that enforces rotationaldisplacement around an axis on a boundary
InteractionIntegralBenchmarkBC
PresetAccelerationPrescribe acceleration on a given boundary in a given direction
PresetDisplacementPrescribe the displacement on a given boundary in a given direction.
PresetVelocity
PressureApplies a pressure on a given boundary in a given direction
StickyBCImposes the boundary condition $var element = document.getElementById("moose-equation-b90fb809-d6ba-4d35-b680-15d12bb06afd");katex.render("u = u_{old}", element, {displayMode:false,throwOnError:false});$ if $var element = document.getElementById("moose-equation-41086741-786b-4b41-90b1-c196c87438bd");katex.render("u_{old}", element, {displayMode:false,throwOnError:false});$ exceeds the bounds provided
Navier Stokes App
EnergyFreeBC
INSMomentumNoBCBCLaplaceFormThis class implements the 'No BC' boundary condition based on the 'Laplace' form of the viscous stress tensor.
INSMomentumNoBCBCTractionFormThis class implements the 'No BC' boundary condition based on the 'traction' form of the viscous stress tensor.
INSTemperatureNoBCBCThis class implements the 'No BC' boundary condition discussed by Griffiths, Papanastiou, and others.
ImplicitNeumannBCThis class implements a form of the Neumann boundary condition in which the boundary term is treated 'implicitly'.
MassFreeBC
MomentumFreeBC
MomentumFreeSlipBC
NSEnergyInviscidSpecifiedBCThis class corresponds to the inviscid part of the 'natural' boundary condition for the energy equation.
NSEnergyInviscidSpecifiedDensityAndVelocityBCThis class corresponds to the inviscid part of the 'natural' boundary condition for the energy equation.
NSEnergyInviscidSpecifiedNormalFlowBCThis class corresponds to the inviscid part of the 'natural' boundary condition for the energy equation.
NSEnergyInviscidSpecifiedPressureBCThis class corresponds to the inviscid part of the 'natural' boundary condition for the energy equation.
NSEnergyInviscidUnspecifiedBCThis class corresponds to the inviscid part of the 'natural' boundary condition for the energy equation.
NSEnergyViscousBCThis class couples together all the variables for the compressible Navier-Stokes equations to allow them to be used in derived IntegratedBC classes.
NSEnergyWeakStagnationBCThe inviscid energy BC term with specified normal flow.
NSImposedVelocityBCImpose Velocity BC.
NSImposedVelocityDirectionBCThis class imposes a velocity direction component as a Dirichlet condition on the appropriate momentum equation.
NSInflowThermalBCThis class is used on a boundary where the incoming flow values (rho, u, v, T) are all completely specified.
NSMassSpecifiedNormalFlowBCThis class implements the mass equation boundary term with a specified value of rho*(u.n) imposed weakly.
NSMassUnspecifiedNormalFlowBCThis class implements the mass equation boundary term with the rho*(u.n) boundary integral computed implicitly.
NSMassWeakStagnationBCThe inviscid energy BC term with specified normal flow.
NSMomentumConvectiveWeakStagnationBCThe convective part (sans pressure term) of the momentum equation boundary integral evaluated at specified stagnation temperature, stagnation pressure, and flow direction values.
NSMomentumInviscidNoPressureImplicitFlowBCMomentum equation boundary condition used when pressure is not integrated by parts.
NSMomentumInviscidSpecifiedNormalFlowBCMomentum equation boundary condition in which pressure is specified (given) and the value of the convective part is allowed to vary (is computed implicitly).
NSMomentumInviscidSpecifiedPressureBCMomentum equation boundary condition in which pressure is specified (given) and the value of the convective part is allowed to vary (is computed implicitly).
NSMomentumPressureWeakStagnationBCThis class implements the pressure term of the momentum equation boundary integral for use in weak stagnation boundary conditions.
NSMomentumViscousBCThis class corresponds to the viscous part of the 'natural' boundary condition for the momentum equations.
NSPenalizedNormalFlowBCThis class penalizes the the value of u.n on the boundary so that it matches some desired value.
NSPressureNeumannBCThis kernel is appropriate for use with a 'zero normal flow' boundary condition in the context of the Euler equations.
NSStagnationPressureBCThis Dirichlet condition imposes the condition p_0 = p_0_desired.
NSStagnationTemperatureBCThis Dirichlet condition imposes the condition T_0 = T_0_desired.
NSThermalBCNS thermal BC.
Chemical Reactions App
ChemicalOutFlowBCChemical flux boundary condition
Porous Flow App
PorousFlowHalfCubicSinkApplies a flux sink to a boundary. The base flux defined by PorousFlowSink is multiplied by a cubic.
PorousFlowHalfGaussianSinkApplies a flux sink to a boundary. The base flux defined by PorousFlowSink is multiplied by a Gaussian.
PorousFlowPiecewiseLinearSinkApplies a flux sink to a boundary. The base flux defined by PorousFlowSink is multiplied by a piecewise linear function.
PorousFlowSinkApplies a flux sink to a boundary.

Available Subsystems

Moose App
Periodic
Tensor Mechanics App
CavityPressure
CoupledPressure
Pressure

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Moose App
AddBCAction

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BCs System

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