Hi. The above issue was resolved using double precision solver. I, however, am facing another issue (convergence related) now when simulating 2 wind turbines together with the same settings as mentioned above (2D; flow induced rotation; SDOF; no remeshing). As soon as I bring another wind tubrine in the domain, I see solution divergence. I have tried many different things like domain size, mesh density, turbulence models, PV coupling, under relaxation factors, time step sizing (fixed and adaptive as well), boundary conditions etc but nothing works. Turbine is 3-bladed NACA0018. Any thoughts on this?