volumeExpression

Choose the scalar field sampled inside the solved volume. This needs volume data, not only a boundary field.

Location

Results → Plot Group → volumeExpression

Initial value: u.

Using the value

Select the completed Data entry and solution point, edit the appropriate plot feature, then click Plot to update Graphics.

Troubleshooting

Check the selected solution, expression and enabled layers if the view is empty. Changing a plot setting does not recompute the study or replace an older saved solution.