Application of an Explicit Algebraic Stress Model for Turbulent Convective Heat Transfer in Ducts

Masoud Rokni

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Abstract

This investigation concerns performance of an Explicit Algebraic Stress Model (EASM) for numerical calculation of turbulent forced convective heat transfer and fluid flow in straight ducts with fully developed conditions. The turbulent Reynolds stresses and other turbulent flow quantities are predicted with an EASM model. The turbulent heat fluxes are modeled by a SED concept, the GGDH and the WET methods. At low-Reynolds numbers new version of GGDH, WET and EASM are presented. However, at high Reynolds numbers, two wall functions are used, one for velocity fields and one for temperature field. All the models are computed in a general three dimensional channel. The numerical approach is based on the finite volume technique with a non-staggered grid arrangement in a general three dimensional geometry. The pressure-velocity coupling is handled by using the SIMPLEC-algorithm. The convective terms are treated by the QUICK scheme while the diffusive terms are handled by the central-difference scheme. The hybrid scheme is used for solving the k and . The overall comparison between the models are presented in terms of the two most important hydraulic parameters namely; friction factor and Nusselt number. The secondary flow generation is also of major concern.
Keyword: Explicit, Algebraic, EASM, Turbulent, Convective, Heat Transfer
Original languageEnglish
Title of host publicationNumerical Methods for Thermal Problems
EditorsR. W. Lewis, J. T. Cross
Volume10
Publication date1997
Publication statusPublished - 1997
Externally publishedYes
EventNumerical Methods for Thermal Problems - Swansea, UK
Duration: 1 Jan 1997 → …

Conference

ConferenceNumerical Methods for Thermal Problems
CitySwansea, UK
Period01/01/1997 → …

Cite this

Rokni, M. (1997). Application of an Explicit Algebraic Stress Model for Turbulent Convective Heat Transfer in Ducts. In R. W. Lewis, & J. T. Cross (Eds.), Numerical Methods for Thermal Problems (Vol. 10)