Unsymmetric results of velocity profile

Michelle

Hi everyone! I am simulating a cylindrical mixing section with two inlets in the same plane (inner jet is faster than the outer flow and they are concentric). I used k-epsilon turbulence model and incompressible air. My results show that the velocity profile in some sections are not symmetric with respect to the centerline, and sometimes the maximum velocity doesn't lie along the center. As far as I know, it should be symmetric with maximum pt at the center as the flow becomes fully developed. I tried to lower (from 5% to 1%) the intensity of turbulence for the inlet conditions but the results were the same. Do you have any explanation for this guys? The most unsymmetric profile is located in the region where there are sudden change in turbulence kinetic energy(TKE). Is it okay to assign similar inlet TKE eventhough the inlet velocities are not equal? Thank you so much guys for your time!

Michelle