Comparison between EVM and RSM turbulence models in predicting flow and heat transfer in rib-roughened channels

    Authors

    A. K. Sleiti;J. S. Kapat

    Comments

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    Abbreviated Journal Title

    J. Turbul.

    Keywords

    2ND-MOMENT CLOSURE; ANGLED RIBS; FRICTION; PASSAGES; PROGRESS; DUCT; Mechanics; Physics, Fluids & Plasmas

    Abstract

    A 3D analysis of two-equation eddy viscosity (EVMs) and Reynolds stress (RSM) turbulence models and their application to solve flow and heat transfer in rotating rib-roughened internal cooling channels is the main focus of this study. The flow in these channels is affected by ribs, rotation, buoyancy, bends and boundary conditions. The EVMs considered are the standard k - epsilon model of Launder and Spalding [ 1], the renormalization group k - epsilon model of Yakhot and Orszag [ 2], the realizable k - epsilon model of Shih et al. [ 3], the standard k -omega model of Wilcox [ 4] and the shear - stress transport ( SST) k -omega model of Menter [ 5]. The viscosity-affected near-wall region is resolved by enhanced near-wall treatment using combined two-layer model with enhanced wall functions. The results for both stationary and rotating channels showed the advantages of Reynolds stress model ( RSM), Gibson and Launder [ 6], Launder [ 7] and Launder et al. [ 8] in predicting the flow field and heat transfer compared to two-equation EVMs that need corrections to account for streamline curvature, buoyancy and rotation.

    Journal Title

    Journal of Turbulence

    Volume

    7

    Issue/Number

    29

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    1

    Last Page

    21

    WOS Identifier

    WOS:000236763200001

    ISSN

    1468-5248

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