FEM ConstraintElectrostaticPotential
Appearance
|
|
| Menu location |
|---|
| Model → Electromagnetic Boundary Conditions → Electrostatic Potential Boundary Condition |
| Workbenches |
| FEM |
| Default shortcut |
| None |
| Introduced in version |
| - |
| See also |
| FEM capacitance example, FEM tutorial |
| Solvers |
|---|
| 1.0 and below: Elmer 1.1 and above: Elmer, CalculiX |
Description
Creates a FEM boundary condition for the electrostatic potential. To be used together with the Electrostatic, Electricforce, Magnetodynamic, Magnetodynamic2D or Static current equation.
introduced in 1.1: Works also with the refactored CalculiX solver object.
Electrostatic potential boundary condition in the capacitance of two spheres FEM Example
Usage
- There are several ways to invoke the command:
- Press the
Electrostatic Potential Boundary Condition button.
- Select the Model → Electromagnetic Boundary Conditions →
Electrostatic Potential Boundary Condition option from the menu.
- Press the
- 1.1 and above: Select a boundary condition type and its parameters:
- Dirichlet - select and specify Potential or Electromagnetic Potential. Optionally, set Electric Infinity and Potential Constant.
- Neumann - specify Electric Flux Density.
- Optionally, define the Capacitance Body.
- Press the Add button.
- In the 3D View select the object the boundary condition should be applied to. introduced in 1.1: To remove objects from the selection, press the Remove button.
Options
The dialog offers the following settings:
- Boundary Condition: To choose between Dirichlet (prescribed potential) and Neumann (prescribed electric flux density) boundary condition type. introduced in 1.1
- Potential: The electric potential in V.
- Electromagnetic Potential: To enable the input of the components of a potential vector field.
- x: The real/imaginary part of the potential in x-direction in V.
For other coordinate systems than Cartesian 3D, this will be the first coordinate of the system instead of x. - y: The real/imaginary part of the potential in y-direction in V.
For other coordinate systems than Cartesian 3D, this will be the second coordinate of the system instead of y. - z: The real/imaginary part of the potential in z-direction in V.
For other coordinate systems than Cartesian 3D, this will be the third coordinate of the system instead of z. If the coordinate system has no third coordinate, this setting will be ignored. - x, y, z checkboxes: To declare the corresponding potential as unknown for the solver.
- Electric Infinity: Option to make a spherical approximation that the volume above the face extends to infinity.
- Potential Constant: Option to set a constant potential.
- Electric Flux Density: The electric flux density (electric displacement field D) in C/m^2. introduced in 1.1
- Capacitance Body: Counter of the body (or face) with a capacitance.
Notes
- Capacitance Body, Electric Infinity, and Potential Constant are Elmer-specific features and won't work with CalculiX.
- Materials: Solid Material, Fluid Material, Non-Linear Mechanical Material, Reinforced Material (Concrete); Material Editor
- Element Geometry: Beam Cross Section, Beam Rotation, Shell Plate Thickness, Fluid Section for 1D Flow
- Electromagnetic Boundary Conditions: Electrostatic Potential Boundary Condition, Current Density Boundary Condition, Magnetization Boundary Condition, Electric Charge Density
- Fluid Boundary Conditions: Initial Flow Velocity Condition, Initial Pressure Condition, Flow Velocity Boundary Condition
- Geometrical Analysis Features: Plane Multi-Point Constraint, Section Print Feature, Local Coordinate System
- Mechanical Boundary Conditions and Loads: Fixed Boundary Condition, Rigid Body Constraint, Displacement Boundary Condition, Contact Constraint, Tie Constraint, Spring Boundary Condition, Force Load, Pressure Load, Centrifugal Load, Gravity Load
- Thermal Boundary Conditions and Loads: Initial Temperature, Heat Flux Load, Temperature Boundary Condition, Body Heat Source
- Overwrite Constants: Constant Vacuum Permittivity
- Mesh: Mesh From Shape by Netgen, Mesh From Shape by Gmsh, Mesh Boundary Layer, Mesh Refinement, Mesh Group, Erase Elements, FEM Mesh to Mesh
- Solve: Solver CalculiX, Solver Elmer, Solver Mystran, Solver Z88; Mechanical Equations: Elasticity Equation, Deformation Equation; Electromagnetic Equations: Electrostatic Equation, Electricforce Equation, Magnetodynamic Equation, Magnetodynamic 2D Equation, Static Current Equation; Flow Equation, Flux Equation, Heat Equation, Solver Job Control, Run Solver
- Results: Purge Results, Show Result, Apply Changes to Pipeline, Post Pipeline From Result, Pipeline Branch, Warp Filter, Scalar Clip Filter, Function Cut Filter, Region Clip Filter, Contours Filter, Glyph Filter, Line Clip Filter, Stress Linearization Plot, Data at Point Clip Filter, Calculator Filter; Filter Functions: Plane, Sphere, Cylinder, Box; Data Visualizations: Create Lineplot, Create Histogram, Create Table
- Utilities: Clipping Plane on Face, Remove All Clipping Planes, FEM Examples; Clear FEM Mesh, Display Mesh Info
- 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, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub
