Investigation of the passage between LES and RANS subdomains in the framework of zonal RANS-LES approaches

A detailed investigation of the passage between LES and RANS subdomains for zonal RANS-LES simulations of wall-bounded flows is performed with the main focus on the turbulent quantities reconstruction at LES-RANS interfaces. It is shown, that most accurate results are obtained if the turbulent quantities are specified from a precursor RANS simulation, while employing the actual solution from the LES subdomain is slightly less precise.