Abstract
Bridging methods are intended to provide the best possible physical fidelity on any given numerical grid while varying seamlessly between the Reynolds-averaged Navier-Stokes (RANS) model and direct numerical simulation (DNS). Two of the most developed bridging methods are the partially integrated transport model (PITM) and partially averaged Navier?Stokes (PANS) model. We choose here the PANS model as the basic approach for the further theoretical extension but the conclusions derived in this work are equally applicable to other bridging methods. In already well-established approach for the PANS, the main model resolution parameter is obtained from the grid spacing and the integral length scale of turbulence. This paper proposes the new approach for the calculation of the integral scale of turbulence by deriving an additional equation for the scale supplying variable which in physical sense can be understood as the modelled resolved kinetic energy.
