傾斜面上を表面波を伴って流れる流下液膜の数値計算 : 第2報, 流動および熱伝達特性に及ぼす表面波の影響〔熱工学, 内燃機関, 動力など〕

概要

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Flow and temperature fields in falling liquid films with interfacial waves have been obtained by means of numerical simulation in which the algorithm is based on the HSMAC method and interfacial boundary conditions are treated with newly proposed methods. Small amplitude disturbance waves at a low frequency develop into isolated solitary waves which are composed of a roll wave and capillary waves. Waves disturbed at a high frequency interfere with each other and develop into disordered waves. Circulation is observed in the roll wave, while there is no circulation in the disordered waves. Temperature fields in the wavy film are distored by the convection effects and differ greatly from those in the laminar film. The circulation in the roll wave has an especially strong effect on the temperature fields. The interfacial waves enhance the heat transfer by two kinds of effects : the variation of the film thickness and the convection in the film. The dominating effect depends on the Prandtl number.
一般社団法人日本機械学会の論文
1997-12-25