You can create a surface current load to define current densities over a surface in a coupled thermal-electrical analysis.
To create or edit a surface current:
Display the surface current load editor using one of the following methods:
To create a new surface current load, follow the procedure outlined in “Creating loads,” Section 16.8.1 (Category: Electrical/Magnetic; Types for Selected Step: Surface current).
To edit an existing surface current load using menus or managers, see “Editing step-dependent objects,” Section 3.4.13. To edit the region to which the load is applied, see “Editing the region to which a prescribed condition is applied,” Section 16.8.4.
Click the arrow to the right of the Distribution field, and select the option of your choice from the list that appears:
Select Uniform to define a load that is uniform over the surface.
Select an analytical field to define a spatially varying load. Only analytical fields that are valid for this load type are displayed in the selection list. Alternatively, you can click 
to create a new analytical field. (See Chapter 58, “The Analytical Field toolset,” for more information.)
In the Magnitude text field, enter the current density (units C L–2T–1). A positive magnitude indicates current flow into the surface.
If desired, click the arrow to the right of the Amplitude field, and select the amplitude of your choice from the list that appears. Alternatively, you can click 
to create a new amplitude. (See Chapter 57, “The Amplitude toolset,” for more information.)
Click OK to save your data and to exit the editor.
