Repository: Freie Universit├Ąt Berlin, Math Department

Scale dependence of subgrid-scale model coefficients: An a priori study

Bou-Zeid, E. and Vercauteren, N. and Parlange, M. B. and Meneveau, C. (2008) Scale dependence of subgrid-scale model coefficients: An a priori study. Physics of Fluid, 20 (115106).

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Dynamic subgrid-scale models require an a priori assumption about the variation in the model coefficients with filter scale. The standard dynamic model assumes independence of scale while the scale dependent model assumes power-law dependence. In this paper, we use field experimental data to investigate the dependence of model coefficients on filter scale for the Smagorinsky and the nonlinear models. The results indicate that the assumption of a power-law dependence, which is often used in scale dependent dynamic models, holds very well for the Smagorinsky model. For the nonlinear model, the power-law assumption seems less robust but still adequate.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics > Geophysical Fluid Dynamics Group
ID Code:1338
Deposited By: Ulrike Eickers
Deposited On:22 Nov 2013 15:30
Last Modified:22 Nov 2013 15:30

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