Direct numerical simulation of turbulent transport with uniform wall injection and suction

A direct numerical simulation (DNS) of the fully developed turbulent channel flow and heat transfer with uniform wall injection and suction was carried out. The Reynolds number, which was based on the channel half-width and the friction velocity averaged on the two walls, was set to be 150, whereas...

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Bibliographic Details
Published in:AIAA journal 1995-07, Vol.33 (7), p.1220-1228
Main Authors: Sumitani, Yasushi, Kasagi, Nobuhide
Format: Article
Language:English
Subjects:
Calculations
Channel flow
Computer simulation
Exact sciences and technology
Fluid dynamics
Friction
Fundamental areas of phenomenology (including applications)
Heat transfer
Physics
Prandtl number
Reynolds number
Simulation
Statistical methods
Stresses
Temperature
Turbulence
Turbulence control
Turbulent flows, convection, and heat transfer
Velocity
Wall flow
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Summary:A direct numerical simulation (DNS) of the fully developed turbulent channel flow and heat transfer with uniform wall injection and suction was carried out. The Reynolds number, which was based on the channel half-width and the friction velocity averaged on the two walls, was set to be 150, whereas the Prandtl number was 0.71. The walls were assumed to be kept at isothermal but different temperatures. With any buoyancy effect neglected, temperature was considered as a passive scalar. The computation was executed on sufficiently dense grid points by using a spectral method. The statistical obtained include the mean velocity and temperature, Reynolds stresses, and turbulent heat fluxes. Each term in the budget equations of the second-order velocity and temperature correlations and of their destruction rates was also calculated. It is found that the injection decreases the friction coefficient, but tends to stimulate the near-wall turbulence activity so that the Reynolds stresses and turbulent heat fluxes are increased, whereas the suction has an inverse influence.
ISSN:0001-1452
1533-385X
DOI:10.2514/3.12363