one phase flow within pipe #2
 

Hello !

Yes, i have concidered gravity, and i had some good results. I want to experiment with the turbulence models abd the wall friction. What is the appropriate model? Should i concider other parameters as well?? Thank you for your help.

P.S.The flow is upwards.

Re: one phase flow within pipe #2
 

I think you'd like to use k-e model first.The "Equation formulation "is very impotant. You'd like to use "parabolic" for your problem. Good lucky!