In fully developed turbulent channel or pipe flows, the validity of a viscous sublayer with a quadratic mean velocity profile strictly requires the gradient of the Reynolds shear stress to be negligible compared to the gradient of the viscous shear stress. Direct numerical simulations suggest that this requirement is satisfied only in the limit y`]0. The use of a quartic, instead of quadratic, profile represents the available numerical and experimental mean velocity data satisfactorily in the region y <10.
A comment on the linear law of the wall for the fully developed turbulent channel flow / Cenedese, Antonio; Romano, Giovanni Paolo; Antonia, R. A.. - In: EXPERIMENTS IN FLUIDS. - ISSN 0723-4864. - 25:2(1998), pp. 165-170. [10.1007/s003480050221]
A comment on the linear law of the wall for the fully developed turbulent channel flow
CENEDESE, Antonio;ROMANO, Giovanni Paolo
;
1998
Abstract
In fully developed turbulent channel or pipe flows, the validity of a viscous sublayer with a quadratic mean velocity profile strictly requires the gradient of the Reynolds shear stress to be negligible compared to the gradient of the viscous shear stress. Direct numerical simulations suggest that this requirement is satisfied only in the limit y`]0. The use of a quartic, instead of quadratic, profile represents the available numerical and experimental mean velocity data satisfactorily in the region y <10.| File | Dimensione | Formato | |
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