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 two-dimensional, incompressible flows and momentum in the x-direction. 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 hot-wire 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;
- Hot-Wire Anemometers;
- Strouhal Number;
- Fluid Mechanics and Heat Transfer