Layered Shell
The Layered Shell node adds the continuity equation for the electric potential and allows for defining the electric conductivity of the layers. This interface closely relates to Current Conservation under The Electric Currents Interface. Even though the interface works on the boundary level, the resulting equations correspond directly to a volumetric model. The Layered Shell includes an extra dimension to describe perpendicular gradients.
Notice that the Layered Shell requires a Layered Material. This has consequences for the continuity equation. For more information about continuity handling, see Electrical Continuity in the Electric Currents, Layered Shell Interface.
Layer Selection
Select the applicable layers (the default setting is All layered materials). Additionally, there is a shorthand available for creating a Single Layer Material (the plus, next to the Layer Selection setting).
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For a general description of layer and interface selections, see The Layer Selection Section.
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The default Layered Shell feature will be locked to the physics interface selection. You can add additional Layered Shell features for specific layers, overriding the default properties.
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You can provide material parameters with a through-thickness variation by explicitly or implicitly using expressions containing the extra dimension coordinate as described in Using the Extra Dimension Coordinates.
Conduction Current
By default, the Electrical conductivity σ (SI unit: S/m) of the layers is defined as From material. If you select User defined, the same user defined value will be applied to all selected layers.
Note that, as opposed to the Current Conservation feature in the Electric Currents, Single Layer Shell Interface, and the Homogenized Shell feature in the Electric Currents, Layered Shell Interface, the Layered Shell feature does support general anisotropy.
User Defined
For User defined select Isotropic, Diagonal, Symmetric, or Anisotropic depending on the characteristics of the electrical conductivity, and then enter values or expressions in the field or matrix.