FEM ConstraintTemperature: Difference between revisions

Latest revision as of 18:34, 18 November 2023

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Constraint heatflux

Constraint body heat source

FEM

Menu location
FEM ConstraintTemperature
Model → Thermal boundary conditions and loads → Temperature boundary condition
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

Defines a temperature boundary condition or, optionally, a concentrated heat flux load.

Usage

There are several ways to invoke the command:
- Press the Temperature boundary condition button.
- Select the Model → Thermal boundary conditions and loads → Temperature boundary condition option from the menu.
In the 3D view select the objects the boundary condition should be applied to, which can be a vertices (corners), edges, or faces.
Enter a temperature to apply to the objects.

Option

By default, this feature defines a temperature boundary condition. By using the option Concentrated heat flux, one can specify a heat flux value (in mW) in each node belonging to the selected geometrical entity.

Notes

The temperature boundary condition uses the *BOUNDARY card in CalculiX. It is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node163.html
The Concentrated heat flux option uses the *CFLUX card in CalculiX: http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node168.html

Constraint heatflux

Constraint body heat source

FEM

FEM Analysis

Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor

Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)

Constraints

Electromagnetic: Electrostatic potential, Current density, Magnetization

Fluid: Initial flow velocity, Initial pressure, Flow velocity

Geometrical: Plane rotation, Section print, Transform

Mechanical: Fixed, Displacement, Contact, Tie, Spring, Force, Pressure, Centrif, Self weight

Thermal: Initial temperature, Heat flux, Temperature, Body heat source

Overwrite Constants: Constant vacuum permittivity

Mesh: Mesh Netgen, Mesh GMSH, Mesh boundary layer, Mesh region, Mesh group, Nodes set, Mesh to mesh

Solve: CalculiX Standard, Elmer, Mystran, Z88; Equations: Deformation, Elasticity, Electrostatic, Electricforce, Magnetodynamic, Magnetodynamic 2D, Flow, Flux, Heat; Solver: Solver control, Solver run

Results: Purge, Show; Postprocessing: Apply changes, Pipeline from result, Warp filter, Scalar clip filter, Function cut filter, Region clip filter, Contours filter, Line clip filter, Stress linearization plot, Data at point clip filter, Filter function plane, Filter function sphere, Filter function cylinder, Filter function box

Utilities: Clipping plane, Remove clipping planes, Open FEM examples; Mesh clear, Mesh display info

Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types

User documentation

Getting started
Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate

Help: Tutorials, Video tutorials
Workbenches: Std Base, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Start, Surface, TechDraw, Test Framework, Web

Addons: Addon Manager, External workbenches, Scripting and macros

Hubs: User hub, Power users hub, Developer hub

@@ Line 1: / Line 1: @@
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+{{Docnav
-{{Docnav|[[FEM_ConstraintHeatflux|Constraint heatflux]]|[[FEM_ConstraintBodyHeatSource|Constraint body heat source]]|[[FEM_Module|FEM]]|IconL=FEM_ConstraintHeatflux.png|IconC=Workbench_FEM.svg|IconR=Fem-constraint-heatflux.svg}}
+|[[FEM_ConstraintHeatflux|Constraint heatflux]]
+|[[FEM_ConstraintBodyHeatSource|Constraint body heat source]]
+|[[FEM_Workbench|FEM]]
+|IconL=FEM_ConstraintHeatflux.svg
+|IconR=FEM_ConstraintBodyHeatSource.svg
+|IconC=Workbench_FEM.svg
+}}
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+{{GuiCommand
-{{GuiCommand|Name=FEM ConstraintTemperature|MenuLocation=Model → Thermal Constraints → Constraint temperature||Workbenches=[[Fem Workbench|FEM]]|Shortcut=|SeeAlso=[[FEM_tutorial|FEM tutorial]]}}
+|Name=FEM ConstraintTemperature
+|MenuLocation=Model → Thermal boundary conditions and loads → Temperature boundary condition
+|Workbenches=[[FEM_Workbench|FEM]]
+|SeeAlso=[[FEM_tutorial|FEM tutorial]]
+}}
 ==Description== <!--T:2-->
 <!--T:6-->
+Defines a temperature boundary condition or, optionally, a concentrated heat flux load.
-Creates a FEM constraint for a temperature boundary condition.
-==Use== <!--T:3-->
+==Usage== <!--T:3-->
 <!--T:7-->
+# There are several ways to invoke the command:
-#Click on [[Image:FEM ConstraintTemperature.png|32px]] or choose {{KEY|Model}} → '''Thermal Constraints'''  →  {{KEY|[[Image:FEM ConstraintTemperature.png|32px]] Constraint temperature}}  from the top menu.
+#* Press the {{Button|[[Image:FEM_ConstraintTemperature.svg|16px]] [[FEM_ConstraintTemperature|Temperature boundary condition]]}} button.
-#Select in the 3D-view the object(s) the constraint should be applied to, which can be:
+#* Select the {{MenuCommand|Model → Thermal boundary conditions and loads → [[Image:FEM_ConstraintTemperature.svg|16px]] Temperature boundary condition}} option from the menu.
-## vertices (corners)
+# In the [[3D_view|3D view]] select the objects the boundary condition should be applied to, which can be a vertices (corners), edges, or faces.
-## edges
+# Enter a temperature to apply to the objects.
-## faces
-#Enter a temperature to apply to the object.
-==Limitations== <!--T:4-->
+===Option=== <!--T:13-->
+<!--T:14-->
+By default, this feature defines a temperature boundary condition. By using the option '''Concentrated heat flux''', one can specify a heat flux value (in mW) in each node belonging to the selected geometrical entity.
 ==Notes== <!--T:5-->
 <!--T:8-->
-#The temperature constraint uses the *BOUNDARY card in CalculiX. the temperature constraint is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node163.html
+* The temperature boundary condition uses the *BOUNDARY card in CalculiX. It is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node163.html
+* The '''Concentrated heat flux''' option uses the *CFLUX card in CalculiX: http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node168.html
 <!--T:10-->
+{{Docnav
-{{Docnav|[[FEM_ConstraintHeatflux|Constraint heatflux]]|[[FEM_ConstraintBodyHeatSource|Constraint body heat source]]|[[FEM_Module|FEM]]|IconL=FEM_ConstraintHeatflux.png|IconC=Workbench_FEM.svg|IconR=Fem-constraint-heatflux.svg}}
+|[[FEM_ConstraintHeatflux|Constraint heatflux]]
+|[[FEM_ConstraintBodyHeatSource|Constraint body heat source]]
-<!--T:11-->
+|[[FEM_Workbench|FEM]]
-{{FEM Tools navi}}
+|IconL=FEM_ConstraintHeatflux.svg
+|IconR=FEM_ConstraintBodyHeatSource.svg
+|IconC=Workbench_FEM.svg
+}}
+</translate>
-<!--T:12-->
+{{FEM Tools navi{{#translation:}}}}
-{{Userdocnavi}}
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