Accession Number : AD0700154

Title :   A UNIFIED COMPARISON OF LOCAL AND GLOBAL TURBULENT SHEAR STRESS MODELS UTILIZED IN THE PREDICTION OF TWO-DIMENSIONAL, INCOMPRESSIBLE TURBULENT BOUNDARY LAYERS.

Descriptive Note : Interim technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND FLUID MECHANICS GROUP

Personal Author(s) : Forsnes,Victor G. ; Abbott,Douglas E.

Report Date : DEC 1969

Pagination or Media Count : 328

Abstract : The goal of the present investigation is to develop a critical and unified comparison of the various turbulent shear stress models (for incompressible, two-dimensional flow) which have appeared in the literature. The comparison is made both for these models themselves as descriptive of the shear stress distribution in a boundary layer, and for these models as they combine with a single mathematical technique to yield solutions of the appropriate boundary layer equations and thus provide a resulting prediction method. Over thirty global and local shear stress models proposed in the literature are compared with thirteen carefully selected experimental studies. This comparison between shear models did not involve any numerical solution techniques for solving the boundary layer equations themselves. On the basis of the resulting critique of the shear models, eleven different models were then incorporated into eleven different computation methods utilizing a single numerical technique (the method of weighted residuals) for solving the resulting governing equations. The numerical calculations that resulted from these computation methods are then compared and a relative ranking of shear models is presented. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, REVIEWS), (*INCOMPRESSIBLE FLOW, SHEAR STRESSES), (*TWO DIMENSIONAL FLOW, SHEAR STRESSES), MATHEMATICAL MODELS, MATHEMATICAL PREDICTION, NUMERICAL METHODS AND PROCEDURES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE