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Turbulence statistics in fully developed channel flow at low Reynolds number

Published online by Cambridge University Press:  21 April 2006

John Kim
Affiliation:
NASA Ames Research Center, Moffett Field, CA 94035, USA
Parviz Moin
Affiliation:
NASA Ames Research Center, Moffett Field, CA 94035, USA
Robert Moser
Affiliation:
NASA Ames Research Center, Moffett Field, CA 94035, USA

Abstract

A direct numerical simulation of a turbulent channel flow is performed. The unsteady Navier-Stokes equations are solved numerically at a Reynolds number of 3300, based on the mean centreline velocity and channel half-width, with about 4 × 106 grid points (192 × 129 × 160 in x, y, z). All essential turbulence scales are resolved on the computational grid and no subgrid model is used. A large number of turbulence statistics are computed and compared with the existing experimental data at comparable Reynolds numbers. Agreements as well as discrepancies are discussed in detail. Particular attention is given to the behaviour of turbulence correlations near the wall. In addition, a number of statistical correlations which are complementary to the existing experimental data are reported for the first time.

Information

Type
Research Article
Copyright
© 1987 Cambridge University Press

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