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findElectromagneticSource

Find electromagnetic source assigned to geometric region

    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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    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
    
    

    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.

    Introduced in R2021a