Accession Number : AD0685240

Title :   NUMERICAL SOLUTION OF THE TURBULENT BOUNDARY LAYER,

Corporate Author : NEW YORK UNIV N Y DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Carr,Lawrence W. ; Fox,Herbert

Report Date : DEC 1968

Pagination or Media Count : 56

Abstract : An implicit finite difference method is presented for the solution of problems of incompressible and compressible turbulent boundary layer flows using the phenomenological boundary layer equations in the physical plane. The turbulent motion is represented by an eddy viscosity; the method permits an arbitrary choice of the model to be used and is thus proposed as an analytical tool for the comparative study of phenomenological turbulence. Since the major changes in the flow variables occur near the wall boundary in turbulent flow, the numerical procedure incorporates a variable-step-size-differentiation in all y direction calculations so that greater accuracy can be obtained in these regions without excessive computational complexity. The relation between step sizes is arbitrary to allow the introduction of experimental data as input to the analysis. The procedure presented is recommended for analysis of turbulent flows influenced by pressure gradients or strong variations in the boundary conditions, e.g., normal or tangential injection. The incompressible flow test cases which were studied include normal injection and adverse pressure gradient. In addition, two viscosity models were studied for flat plate flow. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, NUMERICAL ANALYSIS), INCOMPRESSIBLE FLOW, VORTICES, VISCOSITY, COMPRESSIBLE FLOW, PRESSURE, INJECTION, FLAT PLATE MODELS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE