TY - JOUR
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.
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JO - American Physical Society, Division of Fluid Dynamics 56th Annual Meeting, November 23-25, 2003, East Rutherford, New Jersey, MEETING ID: DFD03
JF - American Physical Society, Division of Fluid Dynamics 56th Annual Meeting, November 23-25, 2003, East Rutherford, New Jersey, MEETING ID: DFD03
ER -