FEM ElectricChargeDensity
|
|
| Menu location |
|---|
| Model → Electromagnetic boundary conditions → Electric charge density |
| Workbenches |
| FEM |
| Default shortcut |
| None |
| Introduced in version |
| 1.1 |
| See also |
| FEM capacitance example, FEM tutorial |
| Solvers |
|---|
| Elmer |
Description
Creates electric charge density load. To be used together with the Electrostatic equation.
Usage
- There are several ways to invoke the command:
- Press the
Electric charge density button. - Select the Model → Electromagnetic boundary conditions → Electric charge density option from the menu.
- Press the
- Select a mode:
- Interface - free surface charge density (to be applied to surfaces in 3D analyses and edges in 2D analyses) allowing modeling of charged layers, equivalent to Electric Flux Density in Electrostatic potential boundary condition, specify Density
- Source - free volume charge density (to be applied to solids in 3D analyses and surfaces in 2D analyses), specify Density
- Total Interface - total charge distributed across the free surface, specify Total Charge
- Total Source - total charge distributed across the free volume, specify Total Charge
- Press the Add button.
- In the 3D view select the object the load should be applied to.
Options
The dialog offers the following settings:
- Interface Charge Density: To specify interface charge density in C/m^2.
- Mode: To choose between the Interface, Source, Total Interface and Total Source modes.
- Source Charge Density: To specify source charge density in C/m^3.
- Total Charge: To specify total charge in C.
FEM
- 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
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, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub