HSBoundaryAmbientConvection

This component is a heat structure boundary that applies convective heat transfer boundary conditions.

Usage

The parameter "hs" specifies the name of the heat structure component, and "boundary" is a list of boundary names on the heat structure where the boundary condition is to be applied.

The parameter "T_ambient" gives the ambient temperature $var element = document.getElementById("moose-equation-d5b881d0-be16-40c4-8f15-fac839adee17");katex.render("T_\\infty", element, {displayMode:false,throwOnError:false});$ , and "htc_ambient" gives the heat transfer coefficient $var element = document.getElementById("moose-equation-1061e19c-0c71-4c61-9f15-9cc94de26885");katex.render("\\mathcal{H}", element, {displayMode:false,throwOnError:false});$ .

The parameter "scale" specifies the name of a functor $var element = document.getElementById("moose-equation-c16473a6-cb7c-419f-bda2-121cd7ccf7e8");katex.render("f", element, {displayMode:false,throwOnError:false});$ that can scale the boundary conditions, for example, a functor material property created with FinEnhancementFactorFunctorMaterial for heat transfer enhancement due to fins.

Input Parameters

T_ambientAmbient temperature functor [K]. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:Ambient temperature functor [K]. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.
boundaryList of boundary names for which this component applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:List of boundary names for which this component applies
hsHeat structure name
C++ Type:std::string
Controllable:No
Description:Heat structure name
htc_ambientAmbient Convective heat transfer coefficient functor [W/(m^2-K)]. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:Ambient Convective heat transfer coefficient functor [W/(m^2-K)]. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.

Required Parameters

scale1Functor by which to scale the boundary condition. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.
Default:1
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:Functor by which to scale the boundary condition. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.
scale_heat_rate_ppTrueIf true, the 'scale' parameter is also applied to the heat rate post-processor.
Default:True
C++ Type:bool
Controllable:No
Description:If true, the 'scale' parameter is also applied to the heat rate post-processor.

Optional 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.

If this component is used with a cylindrical heat structure, the post-processor name_integral is added, which gives the heat rate found by integrating this heat flux over the boundary.

Advanced Parameters

Formulation

The heat conduction equation is the following: $var element = document.getElementById("moose-equation-ab29a9f3-2cad-4240-be87-8238556ea2e6");katex.render(" \\rho c_p \\pd{T}{t} - \\nabla \\cdot (k \\nabla T) = q''' \\eqc", element, {displayMode:true,throwOnError:false});$ where

$var element = document.getElementById("moose-equation-292093c7-8e0b-4b23-a937-3cdafb83eeba");katex.render("\\rho", element, {displayMode:false,throwOnError:false});$ is density,
$var element = document.getElementById("moose-equation-bbd7ee62-0e81-4474-bea3-c47ca718996f");katex.render("c_p", element, {displayMode:false,throwOnError:false});$ is specific heat capacity,
$var element = document.getElementById("moose-equation-19b4731f-3df2-49b5-9b69-6309d672337d");katex.render("k", element, {displayMode:false,throwOnError:false});$ is thermal conductivity,
$var element = document.getElementById("moose-equation-a16ea660-fff9-4d0b-b7e2-d81a872c2ab2");katex.render("T", element, {displayMode:false,throwOnError:false});$ is temperature, and
$var element = document.getElementById("moose-equation-0950b03e-25cf-4c84-bfb6-bb4909b561e5");katex.render("q'''", element, {displayMode:false,throwOnError:false});$ is a volumetric heat source.

Multiplying by a test function $var element = document.getElementById("moose-equation-c9fc3801-90e5-4566-a9eb-6e79cabab44e");katex.render("\\phi_i", element, {displayMode:false,throwOnError:false});$ and integrating by parts over the domain $var element = document.getElementById("moose-equation-52b4e5ab-36e1-4d48-86b7-fbcc9ab4b744");katex.render("\\Omega", element, {displayMode:false,throwOnError:false});$ gives $var element = document.getElementById("moose-equation-f95f0e2a-8ee0-46e2-b285-f57ebb0d6412");katex.render(" \\pr{\\rho c_p \\pd{T}{t}, \\phi_i}_\\Omega + \\pr{k \\nabla T, \\nabla\\phi_i}_\\Omega - \\left\\langle k \\nabla T, \\phi_i\\mathbf{n}\\right\\rangle_{\\partial\\Omega} = \\pr{q''', \\phi_i}_\\Omega \\eqc", element, {displayMode:true,throwOnError:false});$ where $var element = document.getElementById("moose-equation-fb9cda11-e98d-43b8-a641-491c86ae0a09");katex.render("\\partial\\Omega", element, {displayMode:false,throwOnError:false});$ is the boundary of the domain $var element = document.getElementById("moose-equation-4d9d975b-39bf-43fb-b04a-e747f7cabb0e");katex.render("\\Omega", element, {displayMode:false,throwOnError:false});$ .

For Neumann boundary conditions on the boundary $var element = document.getElementById("moose-equation-47c17153-810e-4a8b-8f9e-4e297ad8b43e");katex.render("\\Gamma", element, {displayMode:false,throwOnError:false});$ , $var element = document.getElementById("moose-equation-8448bbea-b4e9-472d-abcb-fb9dbe06e1f3");katex.render("k \\nabla T \\cdot \\mathbf{n}", element, {displayMode:false,throwOnError:false});$ is replaced with a known incoming heat flux function $var element = document.getElementById("moose-equation-c15435ff-834f-49f1-8dcf-b13cf9bc89a6");katex.render("q_b", element, {displayMode:false,throwOnError:false});$ :

var element = document.getElementById("moose-equation-28442d07-4e84-46d9-9dc3-1ef11b6d97d0");katex.render("k \\nabla T \\cdot \\mathbf{n} = q_b \\qquad \\mathbf{x} \\in \\Gamma \\eqp", element, {displayMode:true,throwOnError:false});

For convection boundary conditions, the incoming boundary heat flux $var element = document.getElementById("moose-equation-ba6ce904-763b-4527-bf62-f37349829bb8");katex.render("q_b", element, {displayMode:false,throwOnError:false});$ is computed as

var element = document.getElementById("moose-equation-41355159-3f21-4a77-b99f-0d53f61234cc");katex.render("q_b = f \\mathcal{H} (T_\\infty - T) \\eqc", element, {displayMode:true,throwOnError:false});

where

$var element = document.getElementById("moose-equation-ed3180d4-70e7-4637-a665-1014a562ecac");katex.render("\\mathcal{H}", element, {displayMode:false,throwOnError:false});$ is the heat transfer coefficient,
$var element = document.getElementById("moose-equation-7a5222a2-7426-4319-aa55-a7f273324930");katex.render("T", element, {displayMode:false,throwOnError:false});$ is the temperature of the surface,
$var element = document.getElementById("moose-equation-4d4d76a7-0134-417f-bc96-d9a07720b668");katex.render("T_\\infty", element, {displayMode:false,throwOnError:false});$ is the ambient temperature, and
$var element = document.getElementById("moose-equation-6d0378cc-5ea5-4321-a52e-24783a3d2662");katex.render("f", element, {displayMode:false,throwOnError:false});$ is an optional scaling factor.

Usage
Input Parameters
Formulation