Hi I use 2D axisymmetric swirl model for 2d-simmulation of annular couette flow. I define the fluid source in a moving reference frame with certain angular velocity. Will running it gives the followwing error. Error: divergence detected in AMG solver: x-momentum Thank you in advance. Please help

Hi,

Divergence occurs due to many reasons. Please check whether ur boundary conditions are correct, grid related issues like the aspect ratio of the grids etc,and look at the k and epsilon values of ur turbulence models. also check for ur time step and dx values of ur grid these are the few places where an error or wrong estimation could lead to divergence.