Title: DNS of turbulent heat transfer through two-dimensional slits

Authors: S. Makino, K. Iwamoto, H. Kawamura

Addresses: Department of Mechanical Engineering, Tokyo University of Science, 2641 Yamazaki Noda-city Chiba, 278-8510, Japan. ' Department of Mechanical Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho Koganei-city Tokyo, 184-8588, Japan. ' Department of Mechanical Engineering, Tokyo University of Science, 2641 Yamazaki Noda-city Chiba, 278-8510, Japan

Abstract: Direct Numerical Simulation (DNS) of a turbulent heat transfer in a channel flow with two-dimensional slit has been performed in order to investigate the performance of the heat transfer behind a slit and the effects of the flow contraction on the thermal field. In the wake region, the mean flow becomes asymmetric in the wall-normal direction by the Coanda effect. These asymmetry phenomena affect the heat transfer performance. The several differences are found between the turbulent statistics in this study and those of a backward facing step. This can be attributed to the typical flow through the slit.

Keywords: DNS; direct numerical simulation; turbulence; turbulent heat transfer; two-dimensional obstruct; slits; channel flow; flow contraction.

DOI: 10.1504/PCFD.2008.021315

Progress in Computational Fluid Dynamics, An International Journal, 2008 Vol.8 No.7/8, pp.397 - 405

Published online: 19 Nov 2008 *

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