The paper reports an experimental study of natural convection between two water reservoirs connected through a two-dimensional horizontal duct. The flow field was visualized and the velocities were measured using the thymol blue pH indicator method. The temperature field in the duct region and the heat transfer rate through the duct were also measured. It is shown that the duct flow consists of two streams in counterflow, the warmer stream occupying the upper half of the channel. The two streams are insulated from one another by a mid-depth buffer layer. The measurements demonstrate that the heat transfer mechanism differs fundamentally from the mechanism envisioned in the Bejan and Tien theory [6]. It is also suggested that the basic design of the experimental apparatus can be used in future studies of stability of shear flows in stratified fluids.
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Natural Convection in Horizontal Duct Connecting Two Fluid Reservoirs
A. Bejan,
A. Bejan
Department of Mechanical Engineering, University of Colorado, Boulder, Colo. 80309
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A. N. Rossie
A. N. Rossie
Department of Mechanical Engineering, University of Colorado, Boulder, Colo. 80309
Search for other works by this author on:
A. Bejan
Department of Mechanical Engineering, University of Colorado, Boulder, Colo. 80309
A. N. Rossie
Department of Mechanical Engineering, University of Colorado, Boulder, Colo. 80309
J. Heat Transfer. Feb 1981, 103(1): 108-113 (6 pages)
Published Online: February 1, 1981
Article history
Received:
April 14, 1980
Online:
October 20, 2009
Citation
Bejan, A., and Rossie, A. N. (February 1, 1981). "Natural Convection in Horizontal Duct Connecting Two Fluid Reservoirs." ASME. J. Heat Transfer. February 1981; 103(1): 108–113. https://doi.org/10.1115/1.3244402
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