I have a simple incompressible turbulent flow in a 2D geometry. 1 inlet and 2 outlets.

After getting steady state converged solution, i found out that at a particular outlet i found out that area-weighted avg of velocity magnitude is = 0.836687 m/s

while mass-weighted avg = 0.8434061 m/s

why is the difference ? I was thinking for an incompressible flow the two should be pretty close.

Run the case a) with double precision b) more iterations and see if both match....