Shock waves in dilute bubbly liquids
Shock waves in dilute bubbly liquids
复制标题
稀气泡液体中的冲击波
DOI：
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发表时间：
1994
影响因子：
3.7
通讯作者：
A. Prosperetti
中科院分区：
文献类型：
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作者：
Masao Watanabe;A. Prosperetti
基于数学模型对弱冲击波在含有少量气泡的液体中的传播进行了理论研究，该数学模型包含所有且仅包含气体体积分数中的一阶效应。特别是，准确地描述了气泡和液体之间的热交换。该理论的这一方面是其最重要的组成部分，将阶段之间的相对运动等影响降级为次要的角色。与实验结果的比较证实了冲击波模型的准确性，冲击波有时间从最初的尖锐锋面扩大到更分散的轮廓。对于接近开始的冲击波，理论和实验之间存在显着差异。同样的问题影响所有其他已发表的理论治疗方法。结论是，一些迄今知之甚少的机制控制着气泡液体中冲击波的早期行为。
The propagation of weak shock waves in liquids containing a small concentration of gas bubbles is studied theoretically on the basis of a mathematical model that contains all — and only — the effects that contribute to first order in the gas volume fraction. In particular, the thermal exchange between the gas bubbles and the liquid is described accurately. This aspect of the theory emerges as its most significant component, relegating effects such as the relative motion between the phases to roles of minor importance. Comparison with experimental results substantiates the accuracy of the model for shock waves that have had time to broaden from an initial sharp front to a more diffuse profile. For shock waves closer to inception, marked differences are found between theory and experiment. The same problem affects all other published theoretical treatments. It is concluded that some as yet poorly understood mechanism governs the early-time behaviour of shock waves in bubbly liquids.