A new model for turbulent flows with stable stratification

Boris Galperin, Semion Sukoriansky, Veniamin Perov

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A new spectral closure theory for stably stratified turbulent flows is presented. It is based upon a quasi-Gaussian mapping, the use of the Langevin equation and an algorithm of successive small scales elimination. The new theory allows for a broad insight into the dynamics of stably stratified flows. It accounts for the flow anisotropy and provides expressions for vertical and horizontal eddy viscosities and diffusivities. A combined effect of turbulence and waves is considered. A dispersion relation for internal waves in the presence of turbulence is derived. The model is used to derive new RANS models. A new K-ɛ model and the results of its application to atmospheric boundary layers over ice will be presented.
Original languageEnglish
Title of host publicationAmerican Physical Society, Division of Fluid Dynamics 56th Annual Meeting
StatePublished - 1 Nov 2003


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