Hello, I am simulating the passage of a fluid that moves a spiral, I have tried the option "Flow-Driven Angular Motion" and the option "rotating region". I have the problem that when the fluid just reaches the spiral, the spiral begins to turn, but as it advances the spiral stops. I am doing transient simulation, and I set the boundary condition fluid velocity on the input face and relative pressure of zero on the output face.I attach the file. I appreciate any help.