Turbulent Convective Heat Transfer in a Fully-Developed Wavy Triangular Duc

Masoud Rokni, Thomas B. Gatski

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The performance of an explicit algebraic stress model is assessed in predicting the turbulent flow and forced heat transfer in a wavy duct with triangular cross-section, under fully developed conditions. The waviness is imposed in the main flow direction and periodic conditions are used in this direction. A side by side comparison on secondary flows, axial velocities and axial temperature are considered to clarify the effect of waviness on flow dynamics. Isothermal conditions are imposed on the duct walls, and the turbulent heat fluxes are modeled using a two-equation model of temperature variance and its dissipation rate. For the flow field the only damping function appear in the equation for the dissipation rate to avoid singularity of this quantity. Instead of a constant C (0.09), a function based on the flow field variation is used which eliminates the use of damping function in the turbulent viscosity and accounts for the variation of the C . Comparisons between the turbulent Prandtl number and variation of the C within the ducts, predicted by the models are presented and analyzed.
Keyword: EASM, Low-Reynolds, Triangular Ducts, Wavy, Heat Transfer, Turbulent
Original languageEnglish
Title of host publicationICHMT, Advances in Computational Heat Transfer
EditorsGraham Vahl Davis, Eddie Leonardi
Volume2
Publication date2001
Publication statusPublished - 2001
Externally publishedYes
EventICHMT 2nd Int. Symp. on Advances in Computational Heat Transfer - Queensland, Australia
Duration: 1 Jan 2001 → …

Conference

ConferenceICHMT 2nd Int. Symp. on Advances in Computational Heat Transfer
CityQueensland, Australia
Period01/01/2001 → …

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