Thank you very much for replying! This is exactly I was thinking of....Some fields are specific to the turbulence model itself. But I was still wondering if it has a trick to save simulation time by using the same RANS results for different unsteady turbulence model. On the other hand, I'm still wondering which one should I use as a IC with LES turbulence model like WHALE or Smagorinsky for instance. If I remember well, these type of turbulence model use U and p only. That means, any RANS model could be use for U and p right?