ISSN:
0271-2091
Keywords:
fourth-order finite difference method
;
vorticity-streamfunction formulation
;
general geometry
;
turbulence control
;
drag reduction
;
roughness
;
Engineering
;
Numerical Methods and Modeling
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The fourth-order finite difference method is combined with the vorticity-streamfunction formulation in generalized co-ordinates. Direct numerical simulations are performed for channel flows with and without surface roughness at a Reynolds number of 104. The present results are in good agreement with those of the pseudospectral method with respect to the flow in a smooth channel. It is shown that the present method predicts well the precise change in the flow with the channel length and roughness height. The turbulence is generally weakened by the roughness. Laminarization is also accomplished under the appropriate condition. © 1997 John Wiley & Sons, Ltd.
Additional Material:
13 Ill.
Type of Medium:
Electronic Resource
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