[Merdowaty]

Hi. I am new in that forum. I am student of Military University of Technology (WAT) in Warsaw. I use Fluent 6.2 (WAT license) to my thesis. I modeling flying of artillery munition. I have 10-15% diffrences between Fluent solution and real values. Because I want to compare some thinks with small differences i should have better accuracy. In my flows speed is between 0,6-3Ma and Re numbers 11000000-60000000 (sometimes higher). I use k-omega SST viscout model and set viscout intensity and turbulent viscosity ratio using formulas
Y+ parameter value is between 40-60 but decresing don't change solution.
How can I have more accurate solution?

P.S. Please use quite simply english