FEM ConstraintCurrentDensity: Difference between revisions

From FreeCAD Documentation
(initial)
 
mNo edit summary
 
(15 intermediate revisions by 4 users not shown)
Line 2: Line 2:
<translate>
<translate>


<!--T:4-->
<!--T:1-->
{{Docnav
{{Docnav
|[[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]
|[[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]
|[[FEM_ConstraintInitialFlowVelocity|Constraint initial flow velocity]]
|[[FEM_ConstraintMagnetization|Constraint magnetization]]
|[[FEM_Workbench|FEM]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_ConstraintElectrostaticPotential.svg
|IconL=FEM_ConstraintElectrostaticPotential.svg
|IconR=FEM_ConstraintInitialFlowVelocity.svg
|IconR=FEM_ConstraintMagnetization.svg
|IconC=Workbench_FEM.svg
|IconC=Workbench_FEM.svg
}}
}}


<!--T:1-->
<!--T:2-->
{{GuiCommand
{{GuiCommand
|Name=FEM ConstraintCurrentDensity
|Name=FEM ConstraintCurrentDensity
|MenuLocation= Model → Electromagnetic Constraints Constraint Current Density
|MenuLocation=Model → Electromagnetic boundary conditions → Current density boundary condition
|Workbenches=[[FEM_Workbench|FEM]]
|Workbenches=[[FEM_Workbench|FEM]]
|Version=1.0
|Version=0.21
|SeeAlso=[[FEM_EquationMagnetodynamic|Magnetodynamic equation]], [[FEM_EquationMagnetodynamic2D|Magnetodynamic 2D equation]]
|SeeAlso=[[FEM_Example_Capacitance_Two_Balls|FEM capacitance example]], [[FEM_tutorial|FEM tutorial]]
}}
}}


==Description== <!--T:8-->
==Description== <!--T:3-->


<!--T:2-->
<!--T:4-->
Creates a FEM constraint for the current density. To be used together with the [[FEM_EquationMagnetodynamic2D|Magnetodynamics 2D]] equation.
Creates a FEM boundary condition for the current density. To be used together with the [[FEM_EquationMagnetodynamic|Magnetodynamic]] and [[FEM_EquationMagnetodynamic2D|Magnetodynamic 2D]] equations.


==Usage== <!--T:9-->
==Usage== <!--T:5-->


<!--T:44-->
<!--T:6-->
#* Press the {{Button|[[Image:FEM_ConstraintCurrentDensity.svg|16px]] [[FEM_ConstraintCurrentDensity|FEM ConstraintCurrentDensity]]}} button or use the menu {{MenuCommand|Model → Electromagnetic Constraints → [[Image:FEM_ConstraintCurrentDensity.svg|16px]] Constraint current density}}.
# Press the {{Button|[[Image:FEM_ConstraintCurrentDensity.svg|16px]] [[FEM_ConstraintCurrentDensity|Current density boundary condition]]}} button or use the menu {{MenuCommand|Model → Electromagnetic boundary conditions → [[Image:FEM_ConstraintCurrentDensity.svg|16px]] Current density boundary condition}}.
# In the [[3D_view|3D view]] select the object the constraint should be applied to.
# In the [[3D_view|3D view]] select the object the boundary condition should be applied to.
# Press the {{Button|Add}} button.
# Press the {{Button|Add}} button.


==Options== <!--T:27-->
==Options== <!--T:7-->

<!--T:43-->
The dialog offers the following settings:

<!--T:28-->
[[Image:FEM_CurrentDensity_dialog.png|frame|left]]


<!--T:45-->
<!--T:8-->
* '''Current density_*_1''': The real/imaginary part of the current density in x-direction in A/m².</br> For other coordinate systems than Cartesian 3D, this will be the first coordinate of the system instead of x.
* '''Potential''': The electric potential in V.
* '''Current density_*_2''': The real/imaginary part of the current density in y-direction in A/m².</br> For other coordinate systems than Cartesian 3D, this will be the second coordinate of the system instead of y.
* '''Potential Constant''': Option to set a constant potential.
* '''Current density_*_3''': The real/imaginary part of the current density in z-direction in A/m².</br> 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.
* '''Farfield / Electric infinity''': Option to make spherical approximation that the volume above the face extends to infinity.
* '''Current density_*_*_Disabled''': Whether the corresponding parameter is disabled (assumed as unknown by the solver).
* '''Calculate Electric Force''': Option to trigger the calculation of the electric for using the [[FEM_EquationElectricforce|Electricforce]] equation.
* '''Capacity Body: ''': Counter of the body (or face) with a capacitance.




<!--T:5-->
<!--T:9-->
{{Docnav
{{Docnav
|[[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]
|[[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]
|[[FEM_ConstraintInitialFlowVelocity|Constraint initial flow velocity]]
|[[FEM_ConstraintMagnetization|Constraint magnetization]]
|[[FEM_Workbench|FEM]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_ConstraintElectrostaticPotential.svg
|IconL=FEM_ConstraintElectrostaticPotential.svg
|IconR=FEM_ConstraintInitialFlowVelocity.svg
|IconR=FEM_ConstraintMagnetization.svg
|IconC=Workbench_FEM.svg
|IconC=Workbench_FEM.svg
}}
}}

Latest revision as of 23:16, 13 November 2023

Other languages:

FEM ConstraintCurrentDensity

Menu location
Model → Electromagnetic boundary conditions → Current density boundary condition
Workbenches
FEM
Default shortcut
None
Introduced in version
0.21
See also
Magnetodynamic equation, Magnetodynamic 2D equation

Description

Creates a FEM boundary condition for the current density. To be used together with the Magnetodynamic and Magnetodynamic 2D equations.

Usage

  1. Press the Current density boundary condition button or use the menu Model → Electromagnetic boundary conditions → Current density boundary condition.
  2. In the 3D view select the object the boundary condition should be applied to.
  3. Press the Add button.

Options

  • Current density_*_1: The real/imaginary part of the current density in x-direction in A/m².
    For other coordinate systems than Cartesian 3D, this will be the first coordinate of the system instead of x.
  • Current density_*_2: The real/imaginary part of the current density in y-direction in A/m².
    For other coordinate systems than Cartesian 3D, this will be the second coordinate of the system instead of y.
  • Current density_*_3: The real/imaginary part of the current density in z-direction in A/m².
    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.
  • Current density_*_*_Disabled: Whether the corresponding parameter is disabled (assumed as unknown by the solver).