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findElectromagneticSource

Find electromagnetic source assigned to geometric region

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    Syntax

    emSource = findElectromagneticSource(emagmodel.Sources,RegionType,RegionID)

    Description

    example

    emSource = findElectromagneticSource(emagmodel.Sources,RegionType,RegionID) returns the change or current density emSource assigned to the specified region of the specified model.

    Examples

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    Open Live Script

    Create an electromagnetic model for magnetostatic analysis. 

    emagmodel = createpde("electromagnetic","magnetostatic");

    Include the L-shaped membrane geometry in the model and plot it with the face labels.

    geometryFromEdges(emagmodel,@lshapeg);
pdegplot(emagmodel,"FaceLabels","on")
ylim([-1.1 1.1])
axis equal

    Figure contains an axes object. The axes object contains 4 objects of type line, text.

    Specify a different current density for each face.

    electromagneticSource(emagmodel,"Face",1,"CurrentDensity",10);
electromagneticSource(emagmodel,"Face",2,"CurrentDensity",20);
electromagneticSource(emagmodel,"Face",3,"CurrentDensity",30);

    Check the electromagnetic source specification for each face.

    findElectromagneticSource(emagmodel.Sources,"Face",1)
    ans = 
  ElectromagneticSourceAssignment with properties:

        RegionType: 'Face'
          RegionID: 1
     ChargeDensity: []
    CurrentDensity: 10


    findElectromagneticSource(emagmodel.Sources,"Face",2)
    ans = 
  ElectromagneticSourceAssignment with properties:

        RegionType: 'Face'
          RegionID: 2
     ChargeDensity: []
    CurrentDensity: 20


    findElectromagneticSource(emagmodel.Sources,"Face",3)
    ans = 
  ElectromagneticSourceAssignment with properties:

        RegionType: 'Face'
          RegionID: 3
     ChargeDensity: []
    CurrentDensity: 30
    Open Live Script

    Create and plot a geometry consisting of two nested spheres.

    gm = multisphere([5 15]);
pdegplot(gm,"CellLabels","on","FaceAlpha",0.3)

    Figure contains an axes object. The axes object contains 2 objects of type quiver, patch.

    Create an electromagnetic model for electrostatic analysis.

    emagmodel = createpde("electromagnetic","electrostatic");

    Include the geometry in the model.

    emagmodel.Geometry = gm;

    Specify the charge density for the inner sphere.

    electromagneticSource(emagmodel,"Cell",1,"ChargeDensity",10);

    Check the electromagnetic source specification for each cell.

    findElectromagneticSource(emagmodel.Sources,"Cell",1)
    ans = 
  ElectromagneticSourceAssignment with properties:

        RegionType: 'Cell'
          RegionID: 1
     ChargeDensity: 10
    CurrentDensity: []


    findElectromagneticSource(emagmodel.Sources,"Cell",2)
    ans = 

  0x1 ElectromagneticSourceAssignment array with properties:

    RegionType
    RegionID
    ChargeDensity
    CurrentDensity

    Input Arguments

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    Source in an electromagnetic model, specified as the Sources property of the model.

    Example: findElectromagneticSource(emagmodel.Sources,"Face",1)

    Geometric region type, specified as "Face" for a 2-D model or "Cell" for a 3-D model.

    Data Types: char | string

    Region ID, specified as a vector of positive integers. Find the face or cell IDs by using pdegplot with the "FaceLabels" or "CellLabels" name-value argument set to "on".

    Data Types: double

    Output Arguments

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    Electromagnetic source assignment, returned as an ElectromagneticSourceAssignment object. For more information, see ElectromagneticSourceAssignment Properties.

    Version History

    Introduced in R2021a

    See Also

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