The interface with a fluid condition is used when the contact force produced by the fluid is applied as a force boundary condition along the intersection between fluid and solid domains. Ansys Polyflow computes the force along the wall required to satisfy the velocity condition for the flow from the fluid momentum equation. It applies this force as boundary condition for the elastic momentum equation.

If you give the interface with a fluid condition for the elastic sub-task, you must give the Interface with elastic solid condition on the other side of the boundary for the flow boundary condition. For details, see Interface with Elastic Solid.

To define this condition between an elastic and a flow sub-task, choose the Interface with a fluid menu item in the list of boundary condition choices.

  Interface with a fluid