||July 8, 2012 09:52
How to set up Time Step Size correctly ?
Hello everyone, I have been trying to simulate the free-surface flow around a ship in FLUENT, using a VOF(open channel flow)model, hybrid mesh(tetra close to ship, hexa outer domain), SIMPLE and RNG k-e, and yplus mostly in the range of 150-450, the problem is when I set the Time Step Size 0.01(some papers do), the Cd is 0.08, then the Cd changes to 0.04 when I set the Time Step Size to 0.005(some other papers do) . Could u please give me some advices to set the Time Step Size correctly? Thanks~