NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Multiple-Time-Scale Concepts in Turbulent Transport ModelingProgress in developing a turbulence closure employing two or more independently calculated time scales with which to characterize the rates of progress of different turbulent interactions is reported. The energy containing part of the spectrum is divided into two regions which respond at different rates and in different ways to changes in the environment. The scheme may be regarded as providing an intermediate level of approximation between the relatively simple, but fallible, single-point closures and the vastly more elaborate two-point closures which have so far been applied only to simulating homogeneous flows. The proposed approach requires only slightly more computational effort than single-scale schemes. Computational results are reported for several thin shear flows which show striking improvement in the level of agreement with experiment over that obtained with models employing only one time scale.
Document ID
19810006768
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hanjalic, K.
(Sarajevo Univ. Davis, CA, United States)
Launder, B. E.
(California Univ. Davis, CA, United States)
Schiestel, R.
(California Univ.)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Publication Information
Publication: Von Karman Inst. for Fluid Dyn. Meas. and Predictions of Complex Turbulent Flows, Vol. 1 p
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
81N15283
Funding Number(s)
CONTRACT_GRANT: NSG-2256
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

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