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Turbulence Measurements and Parameterizations

by Keith W. Bedford, Ohio State Univ, Columbus, United States,



Document Type: Proceeding Paper

Part of: Coastal Sediments

Abstract:

Bottom boundary layer and exchange models account for high frequency turbulence via Reynold's averaging and the most advanced closure formulations required by this averaging are turbulent stress/flux and algebraic stress models which are extremely complex. These formulations have considerably improved stratified flow calculations and those with nonisotropic length scales such as flow over bottom dunes. In addition to these traditional closures, this paper also reviews two additional types of averaging definitions. Motivated by the idea that improved averaging might lead to a reduction in closure complexity, these averaging definitions fundamentally address the idea of moving averages and three component wave-turbulent averaging which has been used by atmospheric scientists.

Subject Headings: Flow measurement | Boundary layers | Fluid flow | Wave measurement | Turbulence | Stratified flow | Mathematical models

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