It is important to know that the velocity field needs to be a solution to a compressible potential flow simulation. It has to be an irrotational and inviscid flow, for example, a constant flow field V is of this type. Any other type of flow yields nonphysical solutions for this formulation of the governing equations.
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Coupling between the flow form The Compressible Potential Flow Interface interface to the linearized potential flow model can be set up using the Background Potential Flow Coupling coupling found under the Multiphysics Couplings node. The feature appears when both physics interfaces are present in a model.
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