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Flow and heat transfer in rotating two-pass rectangular channels AR 2 by Reynolds stress turbulence model
 

Summary: Flow and heat transfer in rotating two-pass rectangular
channels šAR ¼ 2Ž by Reynolds stress turbulence model
Mohammad Al-Qahtani a
, Yong-Jun Jang a
, Hamn-Ching Chen b,*, Je-Chin Han c
a
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
b
Ocean Engineering Program, Department of Civil Engineering, Texas A&M University, College Station, TX 77843, USA
c
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
Received 26 March 2001; received in revised form 1 September 2001
Abstract
Numerical predictions of three-dimensional turbulent flow and heat transfer are presented for a rotating two-pass
smooth rectangular channel with channel aspect ratio of 2:1. The focus of this study is to investigate the effect of
rotation, channel orientation and the sharp 180° turn on the flow and heat transfer distributions. Two channel ori-
entations are studied: b ¼ 90° and b ¼ 135°. A multi-block Reynolds-averaged Navier­Stokes (RANS) method was
employed in conjunction with a near-wall second-moment turbulence closure. The Reynolds number (Re) is fixed at
10,000 while the rotation number (Ro) is varied from 0 to 0.22. Two inlet coolant-to-wall density ratios Dq=q are
studied (0.115 and 0.22). The numerical results are compared with the experimental data for both stationary and ro-

  

Source: Al-Qahtani, Mohammad - Mechanical Engineering Department, King Fahd University of Petroleum and Minerals

 

Collections: Engineering