||August 9, 2000 15:53
Multiphase flow problems
I have asked a similar question before, but now I need a touch more detail. I am modelling a ships hull in Fluent, both 2D & 3D. I can setup the steady state multiphase problem with region adaption and patching and I have seperate inlets & outlets for the initial water volume (a box with an inlet face with an upper & lower half, the upper is air in and the bottom is water in, the bottom inlet gets a velocity and a fraction of one, gravity is on), but the solution never seems to converge & if I get results when the error gets low, I get nonsensical results (such as all the water behind the vessel seeming to drain out). About the only time I get good results is within the first 20 iterations (then it looks realistic), but I don't know if I can trust those results to far. Is there any way I can improve the accuracy of the model and solution.