hi, i found that the stream lines at Re~=5 are not symmetry to the axis along the flow, but in textbook,we are told it is symmetry at low Re. can u give me some hint?

regards joe

Did you check your velocities? Also, you need to tell us what exactly you are doing?

i'm cheching the sepatration and vortex dimension behind the cylinder, separation occurs at Re~=5, and i thind the streamlines are symmetry here.