Numerical Simulations of Homogeneous Turbulence using Lagrangian-Averaged Navier-Stokes Equations
Abstract
The Lagrangian-averaged Navier-Stokes equations (LANS) are numerically evaluated as a turbulence closure. They are derived from a novel Lagrangian averaging procedure on the space of all volume-preserving maps and can be viewed as a numerical algorithm which removes the energy content from the small scales (smaller than some a priori fixed spatial scale α) using a dispersive rather than dissipative mechanism, thus maintaining the crucial features of the large scale flow. We examine the modeling capabilities of the LANS equations for decaying homogeneous turbulence, ascertain their ability to track the energy spectrum of fully resolved direct numerical simulations (DNS), compare the relative energy decay rates, and compare LANS with well-accepted LES models.
Attached Files
Published - mohseni.pdf
Accepted Version - MoShKoMaCaWrRo2000.pdf
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Additional details
- Eprint ID
- 20330
- Resolver ID
- CaltechAUTHORS:20101007-091554271
- Created
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2010-11-19Created from EPrint's datestamp field
- Updated
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2020-03-09Created from EPrint's last_modified field