||December 9, 2004 04:46
I'm modelling flow (steady state) over a ship at different wind angles. Some angles lead to a converged solution and others lead to the residuals (and surface velocity monitors) oscillating quite wildly as the solution proceeds after initial trend towards convergence. I've tried decreasing and increasing the under-relaxing factors, and have tried k-w and realizable k-e turbulence models. I'm using 2nd order or above discretisation. Anyone know why I'm still having trouble getting convergence? Thanks.