FEM ConstraintInitialTemperature: Difference between revisions

Latest revision as of 22:29, 19 November 2023

Other languages:

Constraint self weight

Constraint heatflux

FEM

Menu location
FEM ConstraintInitialTemperature
Model → Thermal boundary conditions and loads → Initial temperature
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

Defines an initial temperature for a thermo-mechanical analysis.

Usage

There are several ways to invoke the command:
- Press the Initial temperature button.
- Select the Model → Thermal boundary conditions and loads → Initial temperature option from the menu.
Enter an initial temperature value for the analysis.

Limitations

This tool applies the initial temperature to all nodes in the FEA model - it's not possible to select individual regions.

Notes

This tool uses the *INITIAL CONDITIONS card in CalculiX. It is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node215.html
Initial temperature has to be defined for all thermomechanical analyses performed with CalculiX, even the steady-state ones.

Constraint self weight

Constraint heatflux

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: @@
 <languages/>
 <translate>
 <!--T:10-->
 {{Docnav
@@ Line 14: / Line 15: @@
 {{GuiCommand
 |Name=FEM ConstraintInitialTemperature
-|MenuLocation=Model → Thermal Constraints → Constraint initial temperature
+|MenuLocation=Model → Thermal boundary conditions and loads → Initial temperature
 |Workbenches=[[FEM_Workbench|FEM]]
 |SeeAlso=[[FEM_tutorial|FEM tutorial]]
@@ Line 22: / Line 23: @@
 <!--T:6-->
-Creates an initial temperature constraint for a thermo-mechanical analysis.
+Defines an initial temperature for a thermo-mechanical analysis.
 ==Usage== <!--T:3-->
@@ Line 28: / Line 29: @@
 <!--T:7-->
 # There are several ways to invoke the command:
-#* Press the {{Button|[[Image:FEM_ConstraintInitialTemperature.svg|16px]] [[FEM_ConstraintInitialTemperature|FEM ConstraintInitialTemperature]]}} button.
+#* Press the {{Button|[[Image:FEM_ConstraintInitialTemperature.svg|16px]] [[FEM_ConstraintInitialTemperature|Initial temperature]]}} button.
-#* Select the {{MenuCommand|Model → Thermal Constraints → [[Image:FEM_ConstraintInitialTemperature.svg|16px]] Constraint initial temperature}} option from the menu.
+#* Select the {{MenuCommand|Model → Thermal boundary conditions and loads → [[Image:FEM_ConstraintInitialTemperature.svg|16px]] Initial temperature}} option from the menu.
 # Enter an initial temperature value for the analysis.
@@ Line 35: / Line 36: @@
 <!--T:8-->
-This constraint applies the initial temperature to all nodes in the FEA model - it's not possible to select individual regions.
+This tool applies the initial temperature to all nodes in the FEA model - it's not possible to select individual regions.
 ==Notes== <!--T:5-->
 <!--T:9-->
-#The constraint uses the **INITIAL CONDITIONS card in CalculiX. The initial temperature constraint is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node215.html
+* This tool uses the *INITIAL CONDITIONS card in CalculiX. It is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node215.html
+* Initial temperature has to be defined for all thermomechanical analyses performed with CalculiX, even the steady-state ones.
 <!--T:11-->
@@ Line 56: / Line 57: @@
 {{FEM Tools navi{{#translation:}}}}
 {{Userdocnavi{{#translation:}}}}
-{{clear}}