I am trying to do as follows :

1. Simulate a laminar / turbulent flow in a tube.
2. Calculate the Reynold's number, ( at all cross section , ofcourse it will be same everywhere)
3. Calculate variation of thickness based on the following formula :
4. Implement , the reduction of thickness of tube with above formula using deformed geometry.

However, I am not able to calculate Reynold's number and use it in deformed geometry.

Can some one please tell me a sequence to do above ?

Deformed_geometry