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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

Numerical investigation of turbulent flow in an annular duct partly filled with a porous substrate

page 8
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.570
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RESUMO

The paper is aimed at investigating the turbulent flow and heat transfer characteristics in an annular duct partly filled with a porous medium. A modified k−ε model for approximating the Forchheimer term in the equations of turbulent kinetic energy and dissipation rate is developed by time-averaging the general macroscopic transport equations. This model accounts for the second order approximation in the Forchheimer term. This higher order term leads to a better description of the turbulent effects of the Forchheimer term in the flow through the porous medium. A second law approach, based on the entropy generation is used, in order to find the compromise between hydrodynamics and thermal performances.

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