NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Numerical Experiments on Homogeneous Strained Turbulence Subjected to Coriolis ForceHomogeneous turbulent flows with various combinations of strain-rate, rotation rate and coriolis force capture some important aspects of more complex flows with streamline curvature and rotation. Presently, a situation is considered in which as a box of turbulence rotates, strain axes rotate with it. This is to be contrasted with the elliptic streamline flow in which the strain axes are fixed in an inertial frame. The elliptic flow is known to exhibit (inviscid) growth of turbulent energy and one might expect even more rapid growth with the strain-axes following the box. Instead, it is found that the sign of the Reynolds shear stress is reversed leading to a negative production term for turbulent energy. Partial understanding of the phenomenon is obtained from a consideration of the rotation of inertial waves relative to the strain axes as well as the "pressure-less" RDT argument put forward by Cambon etal. [J. Fluid Mech, 278, 175]. Some comparisons with the predictions of second-order closure models will be presented.
Document ID
20020034937
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Shariff, K.
(NASA Ames Research Center Moffett Field, CA United States)
Blaisdell, G. A.
(Purdue Univ. IN United States)
Abid, R.
(High Technology Corp. United States)
Speziale, C. G.
(Boston Univ. Boston, MA United States)
Rai, Man Mohan
Date Acquired
August 20, 2013
Publication Date
January 1, 1995
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: DFD95 Meeting of the American Physical Society
Location: Irvine, CA
Country: United States
Start Date: November 19, 1995
End Date: November 21, 1995
Sponsors: American Physical Society
Funding Number(s)
PROJECT: RTOP 505-59-53
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