FEM EquationElectricforce
FEM EquationElectricforce |
Menu location |
---|
Solve → Electromagnetic Equations → Electricforce equation |
Workbenches |
FEM |
Default shortcut |
None |
Introduced in version |
0.19 |
See also |
FEM Electrostatic equation |
Description
This equation describes the electrostatic force acting on a surface.
For info about the math of the equation, see the Elmer models manual, section Electrostatic force.
Usage
- After adding an Elmer solver as described here, select it in the tree view.
- Either use the toolbar button or the menu Solve → Electromagnetic Equations → Electricforce equation.
- Now either use the toolbar button or the menu Solve → Electromagnetic Equations → Electrostatic equation. This is important because the electricforce equation needs the potential field calculated by the Electrostatic equation.
- Change the equation's solver settings or the general solver settings if necessary.
The electricforce equation only calculates the force for faces with a electrostatic potential boundary condition if the boundary condition's option Calculate Electric Force is used.
Solver Settings
For the general solver settings, see the Elmer solver settings.
The electricforce equation provides this special setting:
- DataExec Solver: By default the equation is only solved after a time step passed. This means it is first solved after the solution of other equations converged. When the setting is Always the equation is solved after every iteration within a time step. (For steady-state simulations the whole simulation is one time step.)
Analysis Feature Information
The electricforce equation does not have its own analysis features. It takes the electrostatic potential boundary condition from the Electrostatic equation. In the boundary condition it is important to use the option Calculate Electric Force.
Result
The result is the electric force density in .
- 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
- 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
- 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
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
- 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, Assembly, BIM, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub