Wave evolution and heat transfer behavior of a wavy condensate film down a vertical wall have been investigated by a finite difference method, in which the algorithm is based on the HSMAC method, and a staggered grid fixed on a physical space is employed. For the moving interface, newly proposed methods are used. A random perturbation of the film thickness is generated near the leading edge. The perturbation quickly diminishes once and small-amplitude long waves are propagated downstream. Then the amplitude of the wave increases rapidly at a certain position, and the wave shape changes from a sinusoidal wave to a pulse-like solitary wave which is composed of a large-amplitude wave and capillary waves. A circulation flow occurs in the large wave and it affects the temperature field. The heat transfer is enhanced by space-time film thickness variation and convection effects.
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Flow Dynamics and Heat Transfer of Wavy Condensate Film
Akio Miyara, Associate Professor,
Akio Miyara, Associate Professor,
Department of Mechanical Engineering, Saga University, 1 Honjomachi, Saga-shi, 840-8502 Japan
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Akio Miyara, Associate Professor,
Department of Mechanical Engineering, Saga University, 1 Honjomachi, Saga-shi, 840-8502 Japan
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division January 11, 2000; revision received August 14, 2000. Associate Editor: T. Avedisian.
J. Heat Transfer. Jun 2001, 123(3): 492-500 (9 pages)
Published Online: August 14, 2000
Article history
Received:
January 11, 2000
Revised:
August 14, 2000
Citation
Miyara, A. (August 14, 2000). "Flow Dynamics and Heat Transfer of Wavy Condensate Film ." ASME. J. Heat Transfer. June 2001; 123(3): 492–500. https://doi.org/10.1115/1.1370522
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