Accession Number : AD0635028

Title :   TURBULENT BOUNDARY LAYERS WITH ARBITRARY PRESSURE GRADIENTS AND DIVERGENT OR CONVERGENT CROSS FLOWS.

Descriptive Note : Technical rept.,

Corporate Author : PRINCETON UNIV N J GAS DYNAMICS LAB

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

Report Date : MAR 1966

Pagination or Media Count : 44

Abstract : A turbulent viscosity hypothesis which has been previously verified for 'equilibrium' boundary layers is now applied to incompressible boundary layers with arbitrary mainstream pressure variations. The empirical content of the turbulent viscosity hypothesis (which involves three adjustable constants, one of which is the von Karman constant) is solely derived from constant pressure profile data. The present work is an exlension of the previous work in that the mean differential equations of motion are integrated numerically. This time, however, one must deal with partial differential equations instead of the similar, ordinary differential equations applicable to equilibrium flows. An important result is that prediction of the skin friction coefficient and separation is very good. Consideration of divergent or convergent cross flows (secondary flows) is included in the paper. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, DYNAMICS), PRESSURE, SEPARATION, THREE DIMENSIONAL FLOW, EQUATIONS OF MOTION

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE