A new model for turbulent flows with stable stratification

Boris Galperin; Semion Sukoriansky; Veniamin Perov

A new model for turbulent flows with stable stratification

Boris Galperin, Semion Sukoriansky, Veniamin Perov

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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 language	English
Title of host publication	American Physical Society, Division of Fluid Dynamics 56th Annual Meeting
State	Published - 1 Nov 2003

Access to Document

http://adsabs.harvard.edu/abs/2003APS..DFD.AB010G

Cite this

@inproceedings{196109a294fb4a6397988a6a99cd828e,

title = "A new model for turbulent flows with stable stratification",

abstract = "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.",

author = "Boris Galperin and Semion Sukoriansky and Veniamin Perov",

year = "2003",

month = nov,

day = "1",

language = "English",

booktitle = "American Physical Society, Division of Fluid Dynamics 56th Annual Meeting",

}

TY - GEN

T1 - A new model for turbulent flows with stable stratification

AU - Galperin, Boris

AU - Sukoriansky, Semion

AU - Perov, Veniamin

PY - 2003/11/1

Y1 - 2003/11/1

N2 - 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.

AB - 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.

M3 - Conference contribution

BT - American Physical Society, Division of Fluid Dynamics 56th Annual Meeting

ER -

A new model for turbulent flows with stable stratification

Abstract

Access to Document

Fingerprint

Cite this