dave

December 9, 2004 04:46 
oscillating residuals
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 underrelaxing factors, and have tried kw and realizable ke turbulence models. I'm using 2nd order or above discretisation. Anyone know why I'm still having trouble getting convergence? Thanks.
