Hi again!

Im simulating a keel and bulb in water, steady at 13m/s 6 degree angle of attack. The problem is convergence only to 10*-3 and that pressure drag is greatly underestimted. Viscous drag is quite good though. I am using SST with a Y+ of 1 and lift prediction is fine. Any ideas?!

Thanks

Hi Sir rc2v07,

i didn´t get your computational domain. But, change the scheme? - change the mesh? (how about a hexahedrical mesh?) - increase the level of turbulence?

Whatever her merits, good lucky there!

Hi,

Have you done a mesh independance check? Are you running the right rubulence model? You might need a transition turbulence model here. Are you boundaries far enough away? Have you got the inlet turbulence levels set right? Is the surface smoothness correct?

Glenn Horrocks

Hi Glenn,

Have done mesh independence and running SST, tried laminar and K-epsilon to get an initial values file but get overflow problem. Domain is large engough for sure. I might try transitional. Thanks