Hello I am trying to run a simulation for fluid structure interaction. In the definition section under the global Variable probe I am using an expression for the total forces acting on my model. The expression is -intop1(fsi.T_stressx) for drag and -intop1(fsi.T_stressy) for lift forces. But the expression is still orange and showing as unknown expression.
Can someone help me on this how to resolve this issue. Or is there any mistake in defining the expression??
Thanks in advance Sai Teja