[Valle]

Hello everyone,

I'm a newbie in OpenFoam calculation, so I try to compare CFX with OpenFoan results in order to delve myself into OpenFoam numerics. For that I choosed a simple geometry and "simple" physics (simpleFoam) to calculate a TT-junction.
The turbulence model is k-epsilon.
The time discretization was fixed to deltaT = 0.001;End Time=10.
All schemes are Gauss linear (corrected for laplacian), except for div(phi,k) > Gauss upwind and div(phi,epsilon) > Gauss upwind;
Tetrahedral mesh.

After calculating and comparing the problem, I determined velocity spots in the results of the OpenFoam calculation which don't existed in the CFX calculation. In order to understand this difference between OpenFoam and CFX I changed nearly all parameters in the fvSolution and fvSchemes, but the results were always nearly the same. These spots are always present and I don't really understand why this difference between OpenFoam and CFX.

Can someone help me to understand this difference in the results?

Regards
Valentin