Influence of Internal Phenomena on Gas Bubble Motion : Effects of Transport Phenomena and Mist Formation inside Bubble in the Expanding Phase
Influence of Internal Phenomena on Gas Bubble Motion : Effects of Transport Phenomena and Mist Formation inside Bubble in the Expanding Phase
复制标题
内部现象对气泡运动的影响：膨胀阶段气泡内部传输现象和雾气形成的影响
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
Y. Matsumoto
中科院分区：
文献类型：
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作者：
F. Takemura;Y. Matsumoto
当周围压力逐步减小时，模拟单个气泡的运动。在该模拟中，直接求解质量、动量和能量守恒方程，以估计内部现象对气泡运动的影响。同时，还考虑了气相中雾气的形成以及液相中热和不凝性气体的扩散。几种情况的数值结果表明，无量纲传输系数对温度分布、蒸汽浓度和雾气形成有很大影响。随着初始半径变小或减压比变大，由于热传导穿过气泡壁，气泡运动受到雾形成的影响较小。
The motion of a single bubble is simulated when the surrounding pressure decreases stepwise. In this simulation, the conservation equations for mass, momentum and energy are solved directly in order to estimate the effect of internal phenomena on bubble motion. At the same time, the mist formation in the gas phase and the diffusions of heat and noncondensable gas in the liquid phase are taken into account. The numerical results for several cases reveal that nondimensional transport coefficients have large effects on the distributions of temperature, concentration of vapor and the mist formation. As the initial radius becomes smaller or depressurization ratio becomes larger, bubble motion is less influenced by mist formation due to the heat penetration through the bubble wall by heat conduction.