気泡流中における圧力波の伝ぱ

概要

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The propagation of pressure waves in dispersed two phase flow consisting of a suspension of discrete gas bubbles, which have size and number density distribution, in a continuous liqid is investigated numerically. The governing equations for the bubbly flow are formulated with emphasis on the radial motion of the bubbles and the relative motion between the phases. A numerical method, where individual bubbles are traced to calculate their transversal motions and volumetric changes,is developed. The numerical results reveal that the radial and transversal motions of the bubbles have significant influences on the relaxation phenomena behind the shock and rarefaction waves in bubbly flow. These relaxation processes are affected by the interaction between individual bubbles with different sizes. When the deviation of the size distribution of bubbles becomes larger, the amplitude of pressure oscillation behind the shock wave becomes smaller and the waveform is more deformed.
一般社団法人日本機械学会の論文
1990-05-25