Reynolds stresses for unsteady turbulent flows
Abstract
A computational procedure for evaluating the frequency range of the Reynolds stress selected for numerical modeling of unsteady turbulent flows is presented. The discussion is limited to the twodimensional, incompressible flows and momentum in the xdirection. The mean and fluctuating quantities are defined so that the fluctuating quantities vanish over an analytically defined interval. Apparent stress terms are formulated and the Reynolds stress is obtained, noting that the interval chosen must be related to the time step of the computations. Techniques for measuring the Reynolds stress using hotwire anemometers are described, including extraction of the Fourier components.
 Publication:

AIAA Journal
 Pub Date:
 August 1983
 DOI:
 10.2514/3.8229
 Bibcode:
 1983AIAAJ..21.1210H
 Keywords:

 Computational Fluid Dynamics;
 Incompressible Flow;
 Reynolds Stress;
 Turbulent Flow;
 Two Dimensional Flow;
 Unsteady Flow;
 Eddy Viscosity;
 Flow Measurement;
 HotWire Anemometers;
 Strouhal Number;
 Fluid Mechanics and Heat Transfer