Correlation tensor of the stream function as the basis for modeling anisotropic turbulence with specified statistical parameters

Abstract The study is aimed at numerical modeling of turbulent flows, using an artificially generated random field. A multiparametric model of the spectral tensor of covariances of the stream function is proposed, reproducing the most important physical characteristics of a three-dimensional anisotr...
Ausführliche Beschreibung

Abstract The study is aimed at numerical modeling of turbulent flows, using an artificially generated random field. A multiparametric model of the spectral tensor of covariances of the stream function is proposed, reproducing the most important physical characteristics of a three-dimensional anisotropic turbulent field - incompressibility and quantitative values of Reynolds stresses and turbulence scales, obtained from a preliminary calculation. Adaptation of known methods of generation of a turbulent velocity field to the usage of a given tensor is demonstrated. Ausführliche Beschreibung