WIT Press


A Three-dimensional Numerical Study On The Effects Of Inclination Angles On Buoyancy Affected Backward-facing Step Flow And Heat Transfer

Price

Free (open access)

Paper DOI

10.2495/HT980321

Volume

20

Pages

10

Published

1998

Size

1,189 kb

Author(s)

H. Iwai, K. Matsubara, K. Nakabe & K. Suzuki

Abstract

Three-dimensional simulations were carried out for mixed convective flows over a backward-facing step in a rectangular duct. Reynolds number, ex- pansion ratio and aspect ratio were kept constant at /£e=125, ER—2 and AR=l6j respectively. Heat flux at the wall downstream of the step was kept constant, while other walls were kept at adiabatic condition. Effects of the inclination angles, Q\fa, were the main objective in this study. It was found that when Oi was varied from 0° to 360°, the effect of buoyancy became prominent at 01=0°, 180°, while it was relatively small for the two horizontal cases (Oi =90°,270°). However, there was still a small difference in the r

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