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.
Flow Dynamics and Heat Transfer of Wavy Condensate Film
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.
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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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