Accession Number : AD0601277

Title :   THE EFFECTS OF PRESSURE GRADIENTS ON TURBULENT FLOW NEAR A SMOOTH WALL.

Corporate Author : PRINCETON UNIV N J

Personal Author(s) : Mellor,G. L.

Report Date : JAN 1964

Pagination or Media Count : 40

Abstract : A dimensional argument is presented leading to a functional form for the effective viscosity which embraces the hypothesis of a previous paper (Mellor and Gibson, 1963; hereafter referenced as paper A) in the overlap and outer regions of a turbulent boundary layer. The new argument also suggests a way of determining the effective viscosity in the viscous sublayer when the flow is subjected to main stream pressure gradients. This information is used to calculate velocity profiles near the wall and, in particular, to demonstrate deviations from the logarithmic law of the wall when the wall layer parameter is excessively large. Detailed knowledge of the velocity profiles near the wall enables us to eliminate an assumption in paper A relating to near separating flows. (Author)

Descriptors :   (*TURBULENCE, PRESSURE), (*TURBULENT BOUNDARY LAYER, VISCOSITY), (*FLUID MECHANICS, MATHEMATICAL ANALYSIS), VELOCITY, EQUATIONS, MOTION, BOUNDARY LAYER, SHEAR STRESSES, FRICTION, DIFFERENTIAL EQUATIONS, NUMERICAL INTEGRATION, NUMERICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE