Reply To: turbulent viscosity ratio and convergence issues

[abdullahhassan]

Hello Rob, 

So, I have checked the warning issues further by checking temperature, velocity, turbulent viscisity ratio contours at 450 iterations and 600 iterations and I think the problem is the outlet of the shell side. 

At 450 iterations, turbulent viscosity ratio was limited to less then 10 cells. Below are the turbulent viscosity ratio contour at inlet, middle and outlet of shell side.

at 600 iterations, turbulent viscosity ratio increases to almost 2700 cells. below are the liqud & turbulent viscosity ratio contours and Liq. Turbulent Viscosity reaches 1e5 limit.

Do I need to improve the mesh at the outlet, I have drawn polyhedra mesh with zero inflation near shell wall. 

Or I need to increase the length of the outlet? 

What do you think on that?