[Bottikowski96]

Hello together,

I have a problem with my simulation of a non-newtonian fluid. My geometry is a square with the dimensions 1m x 1m. I got some good results and my results converged for different h (length and width of one cell). For h=(0.5, 0.25, 0.125, 0.0625) my results converge after 20-30 iterations with 0.001 as the value of the residuals and the plots for velocity and pressure are good. But if I choose h=0.03125 my result doesn't converge (after 1000 iterations) and the plots aren't good. Does anyone have an advice or knows this problem?

A picture of my mesh is in the attachment. It's a structured mesh with squares.

Best regards and thanks in advance
Bottikowski96