Technical Briefs

Reynolds Stress Anisotropy Based Turbulent Eddy Viscosity Model Applied to Numerical Ocean Models

[+] Author and Article Information
Subhendu Maity

Hari Warrior

Department of Ocean Engineering and Naval Architecture,  Indian Institute of Technology, Kharagpur 721302, Indiawarrior@naval.iitkgp.ernet.in

J. Fluids Eng 133(6), 064501 (Jun 16, 2011) (3 pages) doi:10.1115/1.4004216 History: Received September 17, 2010; Revised May 11, 2011; Published June 16, 2011; Online June 16, 2011

The present state-of-the-art ocean models use an eddy viscosity that depends on structure parameter (Cμ ). In this paper we use a Reynolds stress anisotropy based formulation for the eddy viscosity because in addition to the value of turbulent kinetic energy, it also depends on the degree of anisotropy. The formulation is incorporated into the General Ocean Turbulence Model (GOTM) and simulated using the famous test case of Ocean Weather Station (OWS) Papa experiment. Even if there is not much of an improvement in terms of results with this model, it can be very easily incorporated into the ocean models removing cumbersome equations for structure parameters.

Copyright © 2011 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 1

A time series of the SST for 1 year using MYM and the II-equation model

Grahic Jump Location
Figure 2

(a) Eddy viscosity with depth for respective Julian days. (b) Eddy viscosity with depth for respective Julian days.

Grahic Jump Location
Figure 3

A time series of eddy viscosity values by MYM and II equation



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