Accession Number : ADA132845

Title :   Turbulent Flow in Passage Around a 180 deg Bend; An Experimental and Numerical Study.

Descriptive Note : Annual rept. (Final) 1 Oct 82-30 Sep 83,

Corporate Author : CALIFORNIA UNIV BERKELEY DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Humphrey,Joseph A C

PDF Url : ADA132845

Report Date : Sep 1983

Pagination or Media Count : 166

Abstract : Laser doppler velocimeter measurements for turbulent flow in a 180 degree bend of square cross-section are presented and discussed. These reveal previously undocumented anisotropic features in the flow. Limited data are also provided for the flow in the downstream tangent. Numerical predictions of the flow configurations were made with two types of turbulence models. The two-equation model yields results in broad agreement with the data but fails to reproduce detailed variations present in the flow. It is shown that while the algebraic stress model can resolive these variations, good spatial resolution of the mean flow field is required.

Descriptors :   *Turbulent flow, Curved profiles, Downstream flow, Tangents, Heat transfer, Diffusion, Mathematical models, Numerical methods and procedures, Test equipment, Laser velocimeters

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE