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Mixing lengths scaling in a gravity flow [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We present an experimental study of the mixing processes in a gravity current. The turbulent transport of momentum and buoyancy can be described in a very direct and compact form by a Prandtl mixing length model [1]: the turbulent vertical fluxes of momentum and buoyancy are found to scale quadraticatly with the vertical mean gradients of velocity and density. The scaling coefficient is the square of the mixing length, approximately constant over the mixing zone of the stratified shear layer. We show in this paper how, in different flow configurations, this length can be related to the shear length of the flow √({var_epsilon}/∂{sub z}u³).
Report Numbers
E 1.99:la-ur-09-04812
E 1.99: la-ur-09-4812
la-ur-09-4812
la-ur-09-04812
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Note
Published through SciTech Connect.
01/01/2009.
"la-ur-09-04812"
" la-ur-09-4812"
EUROMECH Colloq 512, Small Scale Turbulence & Related Grad. Stats ; October 26, 2009 ; Torino, Italy.
Funding Information
AC52-06NA25396
View MARC record | catkey: 13820504