Accession Number : AD0746112

Title :   Asymptotic Analysis of Turbulent Channel Flow for Mixing-Length Theory.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Bush,William B. ; Fendell,Francis E.

Report Date : JUN 1972

Pagination or Media Count : 41

Abstract : Limit process expansion techniques are used to analyze fully developed turbulent incompressible flow in an infinitely long channel with plane parallel walls. Closure of the Reynolds time-averaged equations of motion is effected through the introduction of an eddy viscosity linearly proportional to the mean rate of strain, such that the Reynolds stress is quadratic in the mean rate of strain: the closure is a generalization of mixing-length theory. Expansions are carried out in the limit of the turbulent Reynolds number going to infinity, where the turbulent Reynolds number is the ratio of the eddy viscosity to the molecular viscosity. (Author)

Descriptors :   (*INCOMPRESSIBLE FLOW, TURBULENCE), REYNOLDS NUMBER, EQUATIONS OF MOTION, STRESSES, LAMINAR BOUNDARY LAYER, BOUNDARY VALUE PROBLEMS, NUMERICAL ANALYSIS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE