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A physical-space version of the stretched-vortex subgrid-stress model for large-eddy simulation

Voelkl, Tobias and Pullin, D. I. and Chan, Daniel C. (2000) A physical-space version of the stretched-vortex subgrid-stress model for large-eddy simulation. Physics of Fluids, 12 (7). pp. 1810-1825. ISSN 1070-6631. doi:10.1063/1.870429.

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A physical-space version of the stretched-vortex subgrid-stress model is presented and applied to large-eddy simulations of incompressible flows. This version estimates the subgrid-kinetic energy required for evaluation of the subgrid-stress tensor using local second-order structure-function information of the resolved velocity field at separations of order the local cell size. A relation between the structure function and the energy spectrum is derived using the kinematic assumptions of the stretched-vortex model for locally homogeneous anisotropic turbulence. Results of large-eddy simulations using this model are compared to experimental and direct numerical simulation data. Comparisons are shown for the decay of kinetic energy and energy spectra of decaying isotropic turbulence and for mean velocities, root-mean-square velocity fluctuations and turbulence-kinetic energy balances of channel flow at three different Reynolds numbers.

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Additional Information:Copyright © 2000 American Institute of Physics. Received 15 July 1999; accepted 14 March 2000. This work was supported in part by the National Science Foundation under Grant No. CTS-9634222. The channel flow simulations were greatly facilitated by the availability of the Cray T3E at the Pittsburgh Supercomputing Center (PSC) under the Academic Strategic Alliances Program of the Accelerated Strategic Computing Initiative (ASCI/ASAP). Additional computations were performed on the ASCI Bluemountain computer at Los Alamos National Laboratory, and its availability for this work is also gratefully acknowledged.
Subject Keywords:flow simulation; vortices; turbulence; fluctuations; channel flow
Issue or Number:7
Record Number:CaltechAUTHORS:VOEpof00
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2257
Deposited By: Tony Diaz
Deposited On:20 Mar 2006
Last Modified:08 Nov 2021 19:46

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