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JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER Vol. 19, No. 1, JanuaryMarch 2005
 

Summary: JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
Vol. 19, No. 1, January­March 2005
Heat Transfer Prediction of Rotating Rectangular
Channels Using Reynolds Stress Model
Mohammad Al-Qahtani
King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
and
Hamn-Ching Chen
and Je-Chin Han
Texas A&M University, College Station, Texas 77843
Computations were performed to study three-dimensional turbulent flow and heat transfer in a rotating smooth
rectangular channel with channel aspect ratio of 4:1. Two channel orientations ( = 90 and 135 deg from the
rotation direction) were investigated, focusing on the high-rotation and high-density-ratio effects on the heat-
transfer characteristics of the 135-deg orientation. The rotation number and inlet coolant-to-wall density ratios,
/, were varied from 0.0 to 0.28 and from 0.122 to 0.40, respectively; the Reynolds number was fixed at
104. The effect of rotation and coolant-to-wall density ratio on the fluid flow and heat transfer characteristics is
reported. The study shows considerable spanwise heat transfer differences across the leading and trailing surfaces.
Also, it indicates complete flow reversal in the leading part of the channel, altering heat-transfer characteristics.
The numerical results are compared with the experimental data for both stationary and rotating rectangular
channels.

  

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

 

Collections: Engineering