# How to use Rans Results as an initial solution for LES calculation under Openfoam

I performed RANS calculations with simpleFoam and K-omega SST as a turbulence model, and, I want to use the obtained converged result as the initial solution for the LES calculation.

I did a first try, I used only the RANS P and U solutions while for k, nut and nuTilda I put initial conditions as indicated in the tutorial : tutorials\incompressible\pimpleFoam\LES\channel395

the problem is that it runs as if the results were converged, I have for example lines with 0 iterations as below

Courant Number mean: 1.57492e-05 max: 0.200074 deltaT = 1.57492e-08 Time = 5000

smoothSolver: Solving for Ux, Initial residual = 1.97659e-09, Final residual = 1.97659e-09, No terations 0 smoothSolver: Solving for Uy, Initial residual = 6.373e-09, Final residual = 6.373e-09, No Iterations 0 smoothSolver: Solving for Uz, Initial residual = 6.87469e-08, Final residual = 6.87469e-08, No Iterations 0 GAMG: Solving for p, Initial residual = 0.000502593, Final residual = 5.01657e-05, No Iterations 608 time step continuity errors : sum local = 4.97769e-17, global = 8.82671e-20, cumulative = 1.2001e-13 GAMG: Solving for p, Initial residual = 0.000805539, Final residual = 4.7532e-06, No Iterations 1000 time step continuity errors : sum local = 4.7178e-18, global = 1.59872e-19, cumulative = 1.2001e-13 smoothSolver: Solving for k, Initial residual = 3.33989e-06, Final residual = 3.33989e-06, No Iterations 0 ExecutionTime = 49262.5 s ClockTime = 49362 s