An analysis of head-on droplet collision with large deformation in gaseous medium
An analysis of head-on droplet collision with large deformation in gaseous medium
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DOI：
10.1063/1.3580754
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发表时间：
2011-04
影响因子：
4.6
通讯作者：
Peng Zhang;C. Law
中科院分区：
文献类型：
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作者：
Peng Zhang;C. Law
对两个相同的液滴在气体环境中正面碰撞，以及随之产生的弹跳和聚结结果进行了理论分析，在这种情况下，液滴碰撞时的变形程度与原始液滴半径相当，对应于液滴韦伯数的O(1) -O（10）。该模型体现了基本的物理性质，描述了大量的液滴变形，由变形引起的液滴内部运动引起的粘性损失，碰撞液滴界面之间气膜的动力学和稀薄性，以及由于范德华引力而导致这些界面的潜在破坏和合并。该理论模型被应用于研究烃类和水滴在亚大气压力和超大气压力下的碰撞。结果表明，随着韦伯数在O(1) ~ O（10）范围内的增加，…
A theoretical analysis was performed for the head-on collision of two identical droplets in a gaseous environment, with the attendant bouncing and coalescence outcomes, for situations in which the extent of droplet deformation upon collision is comparable to the original droplet radius, corresponding to O(1)–O(10) of the droplet Weber number. The model embodies the essential physics that describes the substantial amount of droplet deformation, the viscous loss through droplet internal motion induced by the deformation, the dynamics and rarefied nature of the gas film between the interfaces of the colliding droplets, and the potential destruction and thereby merging of these interfaces due to the van der Waals attraction force. The theoretical model was applied to investigate collisions involving hydrocarbon and water droplets at sub- and superatmospheric pressures. The results agree well with previous experimental observations in that as the Weber number increases in the range of O(1)–O(10), collision of ...