FEM ConstraintHeatflux: Difference between revisions
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{{Docnav |
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|[[FEM_ConstraintInitialTemperature|Constraint initial temperature]] |
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|[[FEM_ConstraintTemperature|Constraint temperature]] |
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{{GuiCommand |
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{{GuiCommand|Name=FEM ConstraintHeatflux|MenuLocation=Model → Thermal Constraints → Constraint heatflux||Workbenches=[[Fem Workbench|FEM]]|Shortcut=|SeeAlso=[[FEM_tutorial|FEM tutorial]]}} |
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|Name=FEM ConstraintHeatflux |
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|MenuLocation=Model → Thermal boundary conditions and loads → Heat flux load |
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|Workbenches=[[FEM_Workbench|FEM]] |
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|SeeAlso=[[FEM_tutorial|FEM tutorial]] |
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==Description== <!--T:2--> |
==Description== <!--T:2--> |
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Defines a convective heat flux load on a surface at a temperature ''T'' with a film coefficient ''h'' and with the environment (sink) temperature ''T<sub>0</sub>''. The convective heat flux ''q'' will satisfy: '''''q = h(T -T<sub>0</sub>)'''''. Optionally, can also define a regular surface heat flux load. |
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{{Version|1.0}}: Can be also used to define a radiation heat flux on a surface. |
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==Usage== <!--T:3--> |
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# There are several ways to invoke the command: |
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#Click on [[Image:FEM ConstraintHeatflux.png|32px]] or choose {{KEY|Model}} → '''Thermal Constraints''' → {{KEY|[[Image:FEM ConstraintHeatflux.png|32px]] Constraint heatflux}} from the top menu. |
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#* Press the {{Button|[[Image:FEM_ConstraintHeatflux.svg|16px]] [[FEM_ConstraintHeatflux|Heat flux load]]}} button. |
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#* Select the {{MenuCommand|Model → Thermal boundary conditions and loads → [[Image:FEM_ConstraintHeatflux.svg|16px]] Heat flux load}} option from the menu. |
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===Options=== <!--T:13--> |
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By default, this feature defines a convective heat flux. By using the option '''Surface heat flux''', one can specify a heat flux value in Watts per surface area (W/m^2). |
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{{Version|1.0}}: By using the option '''Surface Radiation''', one can specify a radiation heat flux by setting a proper surface emissivity and ambient temperature. |
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==Notes== <!--T:5--> |
==Notes== <!--T:5--> |
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* The heat flux load uses the [http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node203.html *FILM card in CalculiX]. |
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* The '''Surface heat flux''' option uses the [http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node188.html *DFLUX card in CalculiX]. |
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* {{Version|1.0}}: The '''Surface Radiation''' option uses the [http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node234.html *RADIATE card in CalculiX]. |
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|[[FEM_ConstraintInitialTemperature|Constraint initial temperature]] |
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|[[FEM_ConstraintTemperature|Constraint temperature]] |
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|IconL=FEM_ConstraintInitialTemperature.svg |
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Latest revision as of 07:31, 6 May 2024
FEM ConstraintHeatflux |
Menu location |
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Model → Thermal boundary conditions and loads → Heat flux load |
Workbenches |
FEM |
Default shortcut |
None |
Introduced in version |
- |
See also |
FEM tutorial |
Description
Defines a convective heat flux load on a surface at a temperature T with a film coefficient h and with the environment (sink) temperature T0. The convective heat flux q will satisfy: q = h(T -T0). Optionally, can also define a regular surface heat flux load.
introduced in version 1.0: Can be also used to define a radiation heat flux on a surface.
Usage
- There are several ways to invoke the command:
- Press the Heat flux load button.
- Select the Model → Thermal boundary conditions and loads → Heat flux load option from the menu.
- In the 3D view select the face(s) the heat flux load should be applied to.
- Enter the desired heat transfer coefficient and environment temperature.
Options
By default, this feature defines a convective heat flux. By using the option Surface heat flux, one can specify a heat flux value in Watts per surface area (W/m^2).
introduced in version 1.0: By using the option Surface Radiation, one can specify a radiation heat flux by setting a proper surface emissivity and ambient temperature.
Notes
- The heat flux load uses the *FILM card in CalculiX.
- The Surface heat flux option uses the *DFLUX card in CalculiX.
- introduced in version 1.0: The Surface Radiation option uses the *RADIATE card in CalculiX.
FEM
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- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
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