Local mass transfer from the surface of a wall-mounted cube is studied using the naphthalene sublimation technique. The streakline pattern on each face of the cube is visualized using the oil-graphite method. A horseshoe vortex system near the endwall, in conjunction with the separated shear layers initiated at sharp edges, determines the transport characteristics around the cube. As a direct influence of the flow field, the local mass transfer distributions reflect features of three-dimensional flow separation that are significantly different from their two-dimensional counterparts existing in the midsection of a long prism. According to several previous studies, average mass transfer over the rear surface of a square prism without end effects is the highest among all surfaces. However, it is the lowest for the present case with a wall-mounted cube. The cube side wall has the highest average mass transfer overall. This is a result of the elevated local mass transfer existing in the lower portion of the surface, near which a horseshoe vortex system prevails. In addition to local data, correlations of average Sherwood number with Reynolds number are also presented for various surfaces.
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Local Heat/Mass Transfer Distributions on the Surface of a Wall-Mounted Cube
M. K. Chyu,
M. K. Chyu
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
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V. Natarajan
V. Natarajan
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
Search for other works by this author on:
M. K. Chyu
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
V. Natarajan
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
J. Heat Transfer. Nov 1991, 113(4): 851-857 (7 pages)
Published Online: November 1, 1991
Article history
Received:
October 5, 1990
Revised:
February 19, 1991
Online:
May 23, 2008
Citation
Chyu, M. K., and Natarajan, V. (November 1, 1991). "Local Heat/Mass Transfer Distributions on the Surface of a Wall-Mounted Cube." ASME. J. Heat Transfer. November 1991; 113(4): 851–857. https://doi.org/10.1115/1.2911213
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