||September 29, 2006 09:14
residual of volume-fraction increases
Hello, I'm running a unsteady 2D multiphase (granular flow) problem with the eulerian model. I've ste the underrelaxation coefficient for the volume fraction up to 1 to solve a problem with the continuity residual. But now my residual for volume fraction increases in every time step. The step size is 1e-4s. That is the lowest I can handle with, because of the calculation-time. So far, does anybody has an idea what the problem could be??