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Electric Currents, Single Layer Shell Equations in Steady State
In the static study type, the physics interface solves the following equation where  d is the thickness (SI unit: m) of the shell:
σ is the electrical conductivity (SI unit: S/m), Je is an externally generated current density (SI unit: A/m2), and Qj is an external current source (SI unit: A/m3). The operator t represents the tangential derivative along the shell.