Hello users,

When i simuate the problem with hydrofoil connected with hull(body) i get negative values of lift coefficient.

On contrary to that when i run solution with the hydrofoil alone, i get positive value of lift coefficient. i use exactly the same reference values for both the analyses i.e. with & without the hull body interaction. B.C's are:

velocity inlet wall body pressure outlet

solution setup turbulence model

-standard k-E model

-S-A model default settings of monitors and control solution are used. hoping for an early response. Thanks

Could be that the interference effect causes the local angle of attack at your airfoil to go negative?

Set your monitors down to 1e-5...default they are at 10e-3 so your solution may still be converging, and try running a 2nd order solution (if you don't expect unsteady flow)