The normal force and tangential velocity condition combines the concepts of the normal and tangential velocity and force conditions described in Normal and Tangential Velocity Condition and Normal and Tangential Force Condition. A typical use of this condition is for an exit section where the normal force is zero and the tangential velocity is constrained. Note, however, that a specific outflow condition (described in Outflow Condition) is also available. The conventions and restrictions described in Normal and Tangential Velocity Condition and Normal and Tangential Force Condition apply to this condition as well.

To define the normal force and tangential velocity on a boundary section, select the Normal force and tangential velocity imposed (fn, vs) menu item in the list of boundary condition choices.

  Normal force and tangential velocity imposed (fn, vs)

Then specify as a Constant, a Linear function of coordinates, or a Map from CSV (Excel) file. When you select Upper level menu after specifying , Ansys Polydata will bring you to the menu where you can specify as a Constant, a Linear function of coordinates, a Map from CSV (Excel) file, or a User-defined function.