Fully developed flow



I am trying to define a fully developed flow inside a pipe using the Free stream velocity inlet boundary condition and the result is not fully developed flow.

Are there any other definitions i must add in order to achieve the fully developed flow?
Thank you


Hi @RotemL!

I am tagging the @PowerUsers_CFD here who might give you some good input to your problem.

Input from my side would be:

  1. Using a cyclic boundary condition for inlet and outlet

  2. Using a non uniform boundary condition at inlet for U for example U=U0*(1- (r/R)^2). Either upload it as a CSV or type it in as a formula. Never tried that one before to be honest.

  3. Actually simulate the whole pipe

I am sure there are some more methods you can use but I think those are the ones that are commonly used imho.

Documentation page for turbulent pipe flow: Turbulent Pipe Flow - Doc