[p_kmb]

Dear all,

I struggle with my case for a bit, and I need your help.
I am using Fluent steady solver for turbulent incompressible flow. I want to make comparison between flow over rectangular and rectangular with cylinders (within one domain), therefore I use triangle mesh.

The wind speed at velocity inlet is 10m/s, Iu=10% and the turbulence Length scale I calculated is L= 0.133. Other boundary conditions are symmetry and outflow. The walls of the domain are at least 10 times from the model.

I tried to used simple and coupled solution methods. First simple and default orders, then I switched to coupled second order. Second computations with coupled second from the beginning.

I cannot get convergence, my residuals oscillate. Is this because transient nature of flow? Should I use transient solver? If yes, how can I compare the results?

Paulina