[RuiVO]

Good day to you all,

I am running the same case file in OpenFoam and in Fluent, with the most similar Boundary Conditions possible. The problem is that pressure field is similar but velocities are totally different, almost 3 times less in OpenFoam. I do not know what the problem is, I have not attached the Fluent Case file since it is too large. I have however attached files of the OpenFoam case. God I love the maximum size of 97 kb for file attach

Just a heads up of what I have done:
OpenFoam case is run using rhoSimpleFoam solver in laminar regime with total pressure inlet of 4907 and fixed pressure outlet of 3877. The converged inlet velocity is about 38 to 40 m/s.

Fluent case is runned on a pressure based solver, laminar regime with same boundary conditions and the converged velocity inlet is about 140 m/s.

To my knowledge, both solutions have converged.
0.zip

system.zip

constant.zip

case_geom.pdf

Best Regards

Rui Oliveira