NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Numerical Simulations of Homogeneous Turbulence Using Lagrangian-Averaged Navier-Stokes EquationsThe Lagrangian-averaged Navier-Stokes (LANS) equations 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 alpha) 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 large eddy simulation (LES) models.
Document ID
20010021412
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Mohseni, Kamran
(California Inst. of Tech. CA United States)
Shkoller, Steve
(California Univ. Davis, CA United States)
Kosovic, Branko
(California Univ. Davis, CA United States)
Marsden, Jerrold E.
(California Inst. of Tech. CA United States)
Carati, Daniele
(Free Univ. Brussels, Belgium)
Wray, Alan
(NASA Ames Research Center Moffett Field, CA United States)
Rogallo, Robert
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 20, 2013
Publication Date
November 1, 2000
Publication Information
Publication: Studying Turbulence Using Numerical Simulation Databases, 8. Proceedings of the 2000 Summer Program
Subject Category
Fluid Mechanics And Thermodynamics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available