Accession Number : ADA257276
Title : On the Prediction of Turbulent Secondary Flows
Descriptive Note : Contract rept.
Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
Personal Author(s) : Speziale, C G ; So, R M ; Younis, B A
Report Date : Oct 1992
Pagination or Media Count : 22
Abstract : The prediction of turbulent secondary flows with Reynolds stress models in circular pipes and non-circular ducts is reviewed. Turbulence-driven secondary flows in straight non-circular ducts are considered along with turbulent secondary flows in pipes and ducts that arise from curvature or a system rotation. The physical mechanisms that generate these different kinds of secondary flows are outlined and the level of turbulence closure required to properly compute each type is discussed in detail. Illustrative computations of a variety of different secondary flows obtained from two-equation turbulence models and second-order closures are provided to amplify these points. Secondary flows, Reynolds stress closures, K-E model, curvature and rotation.
Descriptors : *PIPES , CLOSURES , PREDICTIONS , DUCTS , CIRCULAR , SECONDARY FLOW , ROTATION , CURVATURE , MODELS
Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
Distribution Statement : APPROVED FOR PUBLIC RELEASE