FEM ConstraintHeatflux: Difference between revisions

From FreeCAD Documentation
No edit summary
No edit summary
(12 intermediate revisions by 5 users not shown)
Line 1: Line 1:
<languages/>
<languages/>
<translate>
<translate>

<!--T:9-->
{{Docnav
|[[FEM_ConstraintInitialTemperature|Constraint initial temperature]]
|[[FEM_ConstraintTemperature|Constraint temperature]]
|[[FEM_Module|FEM]]
|IconL=FEM_ConstraintInitialTemperature.svg
|IconR=FEM_ConstraintTemperature.svg
|IconC=Workbench_FEM.svg
}}

<!--T:1-->
<!--T:1-->
{{GuiCommand
{{GuiCommand|Name=FEM ConstraintHeatflux|MenuLocation=Model → Thermal Constraints → Constraint heatflux||Workbenches=[[Fem Workbench|FEM]]|Shortcut=|SeeAlso=[[FEM_tutorial|FEM tutorial]]}}
|Name=FEM ConstraintHeatflux
|MenuLocation=Model → Thermal Constraints → Constraint heatflux
|Workbenches=[[Fem_Workbench|FEM]]
|SeeAlso=[[FEM_tutorial|FEM tutorial]]
}}


==Description== <!--T:2-->
==Description== <!--T:2-->
Line 9: Line 25:
This constraint specifies film heat transfer of a surface at temperature ''T'' and with a film coefficient ''h'' to the environment or sink at temperature ''T<sub>0</sub> ''. The convective heat flux ''q'' will satisfy: '''''q = h(T -T<sub>0</sub>)'''''
This constraint specifies film heat transfer of a surface at temperature ''T'' and with a film coefficient ''h'' to the environment or sink at temperature ''T<sub>0</sub> ''. The convective heat flux ''q'' will satisfy: '''''q = h(T -T<sub>0</sub>)'''''


==Use== <!--T:3-->
==Usage== <!--T:3-->


<!--T:7-->
<!--T:7-->
# There are several ways to invoke the command:
#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.
#* Press the {{Button|[[Image:FEM_ConstraintHeatflux.svg|16px]] [[FEM_ConstraintHeatflux|ConstraintHeatflux]]}} button.
#Select in the 3D-view the surface(s) the constraint should be applied to.
#* Select the {{MenuCommand|Model → Thermal Constraints → [[Image:FEM_ConstraintHeatflux.svg|16px]] Constraint heatflux}} option from the menu.
#Enter the desired surface temperature, film coefficient and environment temperature.
# In the [[3D_view|3D view]] select the face(s) the constraint should be applied to.

# Enter the desired surface temperature, film coefficient and environment temperature.
==Limitations== <!--T:4-->


==Notes== <!--T:5-->
==Notes== <!--T:5-->
Line 23: Line 39:
#The constraint uses the *FILM card in CalculiX. The heatflux constraint is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node203.html
#The constraint uses the *FILM card in CalculiX. The heatflux constraint is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node203.html



<!--T:10-->
{{Docnav
|[[FEM_ConstraintInitialTemperature|Constraint initial temperature]]
|[[FEM_ConstraintTemperature|Constraint temperature]]
|[[FEM_Module|FEM]]
|IconL=FEM_ConstraintInitialTemperature.svg
|IconR=FEM_ConstraintTemperature.svg
|IconC=Workbench_FEM.svg
}}


</translate>
</translate>
{{FEM Tools navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
{{clear}}
{{clear}}

Revision as of 18:23, 26 February 2021

FEM ConstraintHeatflux

Menu location
Model → Thermal Constraints → Constraint heatflux
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

This constraint specifies film heat transfer of a surface at temperature T and with a film coefficient h to the environment or sink at temperature T0 . The convective heat flux q will satisfy: q = h(T -T0)

Usage

  1. There are several ways to invoke the command:
    • Press the ConstraintHeatflux button.
    • Select the Model → Thermal Constraints → Constraint heatflux option from the menu.
  2. In the 3D view select the face(s) the constraint should be applied to.
  3. Enter the desired surface temperature, film coefficient and environment temperature.

Notes

  1. The constraint uses the *FILM card in CalculiX. The heatflux constraint is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node203.html