331 CIP-CUP, ハイブリッド移流スキームおよび多重時間ステップ積分法による低マッハ数自由表面流れの解法とその音響的気泡間相互作用への応用

概要

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Recent progresses of theoretical and numerical understandings of multibubble dynamics in a sound field are reviewed. In recent papers, we have pointed out that an unknown characteristic frequency exists in a system of gas bubbles acoustically interacting with each other, a frequency which reverses the pulsation phase of a bubble in the system without accompanying resonant response, and is named "transition frequency". Furthermore, we, based on transition-frequency analysis, provided an alternative interpretation of the sign reversal of the secondary Bjerknes force acting between pulsating gas bubbles, which can be either attractive or repulsive. Those findings have been well reproduced by the direct numerical simulation using an improved CIP-CUP method we have proposed. In the present paper, we mention several interesting points of this physical problem in the physical and numerical viewpoints.
一般社団法人日本機械学会の論文
2003-11-22