Abstract
Flow dynamics and heat transfer of falling liquid films with interfacial waves flowing on a vertical plate have been studied with originally proposed numerical simulation method. To discretize basic equations a staggered grid fixed on a physical space is employed. A small amplitude disturbance generated at inflow boundary develops to a solitary wave which consists of a large amplitude roll wave and small amplitude capillary waves. Instantaneous streamwise velocity profiles at the wave crest and trough are very different from a laminar flow. A circulation flow occurs in the roll wave and it affects temperature distributions, especially the strong effect is observed for high Prandtl number liquids. The interfacial wave enhances the heat transfer by two kinds of effects which are a film thinning effect and a convection effect. The dominating effect depends on the Prandtl number.
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Received on 23 December 1998
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Miyara, A. Numerical analysis on flow dynamics and heat transfer of falling liquid films with interfacial waves. Heat and Mass Transfer 35, 298–306 (1999). https://doi.org/10.1007/s002310050328
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DOI: https://doi.org/10.1007/s002310050328