FEM ConstraintBodyHeatSource: Difference between revisions

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Defines an internally generated body heat given in W/kg.
Defines an internally generated body heat given in W/kg.

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{{VersionPlus|1.0}}: Can also define the heat source in W.


==Usage== <!--T:9-->
==Usage== <!--T:9-->
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#** ''Total Power'' - enter the total power in W.
#** ''Total Power'' - enter the total power in W.


==Limitation== <!--T:12-->
==Limitations== <!--T:12-->


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{{VersionMinus|0.20}}: The body heat source is applied to the whole model, meaning all bodies of the setup. It is not possible to select an individual body.
* {{VersionMinus|0.20}}: The body heat source is applied to the whole model, meaning all bodies of the setup. It is not possible to select an individual body.
* {{VersionMinus|0.21}}: This feature only works with the Elmer solver.


==Notes== <!--T:10-->
==Notes== <!--T:10-->
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* For more information see [https://forum.freecadweb.org/viewtopic.php?f=18&t=44705&start=490#p422539 this forum thread] and following posts. [https://forum.freecadweb.org/viewtopic.php?f=18&t=28926 This thread] may also be useful.
* For more information see [https://forum.freecadweb.org/viewtopic.php?f=18&t=44705&start=490#p422539 this forum thread] and following posts. [https://forum.freecadweb.org/viewtopic.php?f=18&t=28926 This thread] may also be useful.
* Elmer examples can also be found in [https://www.nic.funet.fi/pub/sci/physics/elmer/doc/ElmerTutorials.pdf Elmer GUI Tutorials].
* Elmer examples can also be found in [https://www.nic.funet.fi/pub/sci/physics/elmer/doc/ElmerTutorials.pdf Elmer GUI Tutorials].
* {{VersionPlus|1.0}}: This feature uses the [https://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node188.html *DFLUX card in CalculiX].

* {{VersionPlus|1.0}}: Since CalculiX expects body heat flux input in W/mm^3 while for Elmer it's W/kg, the conversion of the specified value (in W or W/kg) is done internally for each solver, using the volume of the selected solid and the density of the material assigned to it, if needed.


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Latest revision as of 09:07, 13 June 2024

FEM ConstraintBodyHeatSource

Menu location
Model → Thermal boundary conditions and loads → Body heat source
Workbenches
FEM
Default shortcut
None
Introduced in version
0.19
See also
FEM tutorial

Description

Defines an internally generated body heat given in W/kg.

version 1.0 and above: Can also define the heat source in W.

Usage

  1. Press the Body heat source button or select Model → Thermal boundary conditions and loads → Body heat source from the menu.
  2. version 0.21 and above: For a 3D analysis, select a 'solid' (body) from your model, for a 2D analysis select a face.
  3. Set the value:
    • version 0.20 and below: Since the tool has no task dialog, use the property editor and set the property DataHeat Source.
    • introduced in version 0.21: Enter the body heat in W/kg.
    • version 1.0 and above: Select the mode:
      • Dissipation Rate - enter the dissipation rate in W/kg .
      • Total Power - enter the total power in W.

Limitations

  • version 0.20 and below: The body heat source is applied to the whole model, meaning all bodies of the setup. It is not possible to select an individual body.
  • version 0.21 and below: This feature only works with the Elmer solver.

Notes

  • For more information see this forum thread and following posts. This thread may also be useful.
  • Elmer examples can also be found in Elmer GUI Tutorials.
  • version 1.0 and above: This feature uses the *DFLUX card in CalculiX.
  • version 1.0 and above: Since CalculiX expects body heat flux input in W/mm^3 while for Elmer it's W/kg, the conversion of the specified value (in W or W/kg) is done internally for each solver, using the volume of the selected solid and the density of the material assigned to it, if needed.