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Journal of Applied Mathematics
Volume 2012 (2012), Article ID 246313, 21 pages
http://dx.doi.org/10.1155/2012/246313
Research Article

Large Eddy Simulation of Turbulent Flow and Heat Transfer in a Ribbed Coolant Passage

Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208 016, India

Received 25 February 2011; Revised 9 September 2011; Accepted 13 October 2011

Academic Editor: Shia-Hui Peng

Copyright © 2012 Abhishek G. Ramgadia and Arun K. Saha. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Numerical simulations of hydrodynamic and thermally fully developed turbulent flow are presented for flow through a stationary duct with periodic array of inline transverse rib turbulators. The rib height to hydraulic diameter ratio ( 𝑒 / 𝐷 ) is 0.1 and the rib pitch to rib height ratio ( 𝑃 / 𝑒 ) is 10. The effect of secondary flow due to presence of rib turbulators on heat and mass transfer has been investigated. The present work reviews the use of a large eddy simulation (LES) turbulence model, known as shear-improved Smagorinsky model (SISM), for predicting flow and heat transfer characteristics in the fully developed periodic flow region. The computations are performed for Reynolds number of 2,053 and the working fluid chosen to be air, the Prandtl number of which is 0.7. Instantaneous flow field, time-mean, and turbulent quantities are reported together with heat transfer and a close match with experiments has been observed.