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
Keyword: EASM, Low-Reynolds, Triangular Ducts, Wavy, Heat Transfer, Turbulent
| Original language | English |
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| Title of host publication | ICHMT, Advances in Computational Heat Transfer |
| Editors | Graham Vahl Davis, Eddie Leonardi |
| Volume | 2 |
| Publication date | 2001 |
| Publication status | Published - 2001 |
| Externally published | Yes |
| Event | 2nd International Symposium on Advances in Computational Heat Transfer - Queensland, Australia Duration: 20 May 2001 → 25 May 2001 |
Conference
| Conference | 2nd International Symposium on Advances in Computational Heat Transfer |
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| Country/Territory | Australia |
| City | Queensland |
| Period | 20/05/2001 → 25/05/2001 |