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Table of Contents
Thermal Load Elements (Metafor > v3593)
Since MR167 (Metafor v3593), there are two kind of thermal load elements depending on whether the load is applied on the volume element (volumetric source) of on the boundary of the elements.
All of them are implemented on the same framework and have the same options.
Element
The first step consists in defining an ElementProperties, as
prp = ElementProperties(typeEl) prp.put(param, value) prp.put(vecParam, values) prp.append(vecParam, value)
where
typeEl | desired element (for example Pressure[2|3]DElement - see below) |
param | name of the property associated to the element (e.g. NIP) |
vecParam | name of the vector property associated to the element (e.g. MATERIALS) |
value | value of the corresponding property (e.g. the Number of Integration Points) |
values | array of valuse of the corresponding vector property (e.g. material indexes) |
Interaction
The interaction used for thermal boundary/source elements is a LoadingInteraction. It is defined as:
load = LoadingInteraction(no) load.push(gObject1) load.push(gObject2) ... load.addProperty(prp) interactionset.add(load)
where
no | number of the Interaction |
gObject1, gObject2 | meshed geometric entity where the boundary conditions are applied (one part of the boundary or on part of the mesh) |
prp | Properties of boundary condition elements to be generated |
The Source Elements are defined on Volumic mesh where Boundary Elements are defined on boundary of the mesh.
Element Types
TmBoundary2DElement - TmBoundary3DElement - TriangleTmBoundary3DElement
Boundary elements has to be defined in the LoadingInteraction on the boundary of the mesh.
- The
TmBoundary2DElementare defined on lines (wires) of a 2D quadrangular mesh. - The
TmBoundary3DElementare defined on sides (skins) of a 3D hexahedral mesh. - The
TriangleTmBoundary3DElementare defined on sides (skins) of a 3D tetrahedral mesh.
Parameters
| Name | Description | Dependency |
|---|---|---|
STIFFMETHOD | Method used to compute the stiffness matrix\\= STIFF_ANALYTIC : analytic matrix (default)= STIFF_NUMERIC : numerical matrix | - |
MATERIALS | Array of numbers of ThermalBoundaryMaterial to consider | - |
NIP | Number of integration points by direction (default : 2) for TriangleTmBoundary3DElement : Total Number of integration points (default : 1) | - |
Tm2Boundary2DElement - Tm2Boundary3DElement - TriangleTm2Boundary3DElement
Boundary elements has to be defined in the LoadingInteraction on the boundary of the mesh where the TM2 formalism is used (second order thermal field on a first order geometrical mesh)
- The
Tm2Boundary2DElementare defined on lines (wires) of a 2D quadrangular mesh. - The
Tm2Boundary3DElementare defined on sides (skins) of a 3D hexahedral mesh. - The
TriangleTm2Boundary3DElementare defined on sides (skins) of a 3D tetrahedral mesh.
Parameters
| Name | Description | Dependency |
|---|---|---|
STIFFMETHOD | Method used to compute the stiffness matrix\\= STIFF_ANALYTIC : analytic matrix (default)= STIFF_NUMERIC : numerical matrix | - |
MATERIALS | Array of numbers of ThermalBoundaryMaterial to consider | - |
NIP | Number of integration points by direction (default : 3) for TriangleTm2Boundary3DElement : Total Number of integration points (default : 3) | - |
TmSource2DElement - TmSource3DElement - TriangleTmSource2DElement (missing TetraTmSource3DElement)
Source elements has to be defined in the LoadingInteraction on a volumetric mesh.
Be careful that they can be associated to any ThermalBoundaryMaterial that can have no physical meaning (ex : defining a ConvectionMaterial in a mesh not on its surface), but could be a work around to apply heat to a model… Up to now, there a no physical consistency test…
- The
TmSource2DElementare defined on sides (skins) of a 2D quadrangular mesh. - The
TmSource3DElementare defined on volumes of a 3D hexahedral mesh. - The
TriangleTmSource3DElementare defined on volumes of a 3D tetrahedral mesh.
Parameters
| Name | Description | Dependency |
|---|---|---|
STIFFMETHOD | Method used to compute the stiffness matrix\\= STIFF_ANALYTIC : analytic matrix (default)= STIFF_NUMERIC : numerical matrix | - |
MATERIALS | Array of numbers of ThermalBoundaryMaterial to consider | - |
NIP | Number of integration points by direction (default : 2) for TriangleTmSource3DElement : Total Number of integration points (default : 1) | - |
Tm2Source2DElement - Tm2Source3DElement - TriangleTm2Source2DElement (missing TetraTmSource3DElement)
Source elements has to be defined in the LoadingInteraction on a volumetric mesh where the TM2 formalism is used (second order thermal field on a first order geometrical mesh)
Be careful that they can be associated to any ThermalBoundaryMaterial that can have no physical meaning (ex : defining a ConvectionMaterial in a mesh not on its surface), but could be a work around to apply heat to a model… Up to now, there a no physical consistency test…
- The
Tm2Source2DElementare defined on sides (skins) of a 2D quadrangular mesh. - The
Tm2Source3DElementare defined on volumes of a 3D hexahedral mesh. - The
TriangleTm2Source3DElementare defined on volumes of a 3D tetrahedral mesh.
Parameters
| Name | Description | Dependency |
|---|---|---|
STIFFMETHOD | Method used to compute the stiffness matrix\\= STIFF_ANALYTIC : analytic matrix (default)= STIFF_NUMERIC : numerical matrix | - |
MATERIALS | Array of numbers of ThermalBoundaryMaterial to consider | - |
NIP | Number of integration points by direction (default : 3) for TriangleTm2Boundary3DElement : Total Number of integration points (default : 3) | - |