Jim Day
Ansys Employee
The initialization of the ambient fluid state (internal energy and relative volume) in the EOS will create pressure and thus velocity in the ambient material. But to sustain the inflow energy or pressure, you would need to include the keyword *BOUNDARY_AMBIENT_EOS to specify internal energy and relative volume as functions of time. If that's insufficient to achieve the desired velocity profile in the ambient material, consider adding *BOUNDARAY_PRESCRIBED_MOTION for the ambient material's nodes. Be careful to consider whether specifying internal energy, relative volume, and velocity of the same material may result over-specification (conflict of) boundary conditions.