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Nonuniform Isotropic

Nonuniform isotropic materials include both electric and magnetic insulating and lossy media, characterized by user-supplied values of the permittivity, the permeability, and the electric and magnetic conductivity. Nonuniform isotropic materials differ from isotropic materials in that users also supply a density value in nonuniform isotropic materials. This material type is useful when calculating Absorption Rates.

The model geometry will need properties assigned to it in order to mesh and simulate the model.

Defining and assigning Nonuniform Isotropic Materials
  1. This method opens the properties panel of the material and allows the user to make edits to its electromagnetic properties. It also allows the user to consecutively select multiple geometric entities in the model window.

    1. Click Materials Material Image 16 color within the Definitions section under the EMA3D tab in the ribbon.

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    2. Click the material type in the drop-down list.

    3. In the Properties panel select the ellipsis to the right of Material. A new window will appear.

      In the pop-up window, under the Local tab, select New New Material Image 16. Double click to view and change the new material's properties.

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    4. Click General to view and change any property values. The adjustable properties are defined in the table at the end of this section. The color is in A, R, G, B format and choosing an A between 0 (most transparent) and 255 (opaque) can make the color and mesh semi-transparent.

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    5. Click on the appropriate selection tool (i.e., body Select Body Image 16, surface Select Surface Image 16 , or line Select Line Image 16) tool in the top left of the model window to restrict the assignment definition.

    6. To assign material properties, either select the geometric entity in the model window or in the Structure Tree.

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    7. The selected surfaces will be recolored in the model window.

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    8. To hide the color and revert to the original, more transparent view, uncheck the check box next to the material type under the Definitions node in the Simulation Tree to hide specific materials or uncheck Definitions to hide all materials.

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    9. Repeat the above steps to assign as many materials as desired.

    10. Users can edit material properties by following the steps above to return to the material's Properties Panel or by right clicking the material name in the Simulation Tree and selecting Edit Assignments.

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    11. Click Check Image 16 to complete the material assignments.

Nonuniform Isotropic material properties
Material Properties

Entry

Meaning

Color

The material display color - format is A, R, G, B and choosing an A less than 255 (opaque) will make the color and mesh semi-transparent

Name

Display name of the material

Density [kg/m3]

The material density

ε [F/m]

The material permittivity

Relative Permittivity

The material relative permittivity

Permeability (μ) [H/m]

The material permeability

Relative Permeability

The material relative permeability

Electric Conductivity σe[S/m]

The material electric conductivity

Magnetic Conductivity σm

The material magnetic conductivity

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