Liquid-in-liquid compound drop impact on viscous liquid films

IF 3.8 2区工程技术 Q1 MECHANICS

International Journal of Multiphase Flow Pub Date : 2025-08-05 DOI:10.1016/j.ijmultiphaseflow.2025.105376

Bin Liao , Weimin Ji , Pengfei Zhang , Yang Bu , Qilin Zhang , Shanqun Chen

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Abstract

In this study, we conduct a systemaic numerical investigation under moderate Weber number, high Ohnesorge number, axisymmetric, and equal-density compound drops with thin underlying films into the rebound behavior of a liquid-in-liquid compound drop impact on viscous liquid films. Through energy budget analysis, we elucidate the underlying mechanisms governing the transition from bouncing to non-bouncing (floating) behavior of the compound drop. We also calibrate the existing phenomenological model and reproduce the observed trends of the liquid-in-liquid compound drop impact on viscous liquid films. Furthermore, our findings indicate that the energy transferred from the impacting compound drop to the liquid film remains negligibly affected by variations in volume ratio and viscosity ratio between the inner and outer droplets. Finally, we demonstrate that increasing the volume ratio and decreasing the viscosity ratio suppress the motion of the inner droplet when these parameters do not reach specific thresholds.

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液中液复合液滴对粘性液膜的影响

在本研究中，我们对中等韦伯数、高奥内佐格数、轴对称、等密度、底层薄膜薄的复合液滴下液中复合液滴撞击黏性液膜的回弹行为进行了系统的数值研究。通过能量收支分析，我们阐明了控制复合水滴从弹跳到非弹跳（漂浮）行为转变的潜在机制。我们还对现有的现象学模型进行了校正，重现了观察到的液中液复合液滴对粘性液膜的影响趋势。此外，我们的研究结果表明，撞击化合物液滴向液膜传递的能量受内外液滴体积比和粘度比变化的影响可以忽略不计。最后，我们证明了增加体积比和降低粘度比在这些参数未达到特定阈值时抑制了内液滴的运动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Multiphase Flow 物理-力学

CiteScore

7.30

自引率

10.50%

发文量

244

审稿时长

4 months

期刊介绍： The International Journal of Multiphase Flow publishes analytical, numerical and experimental articles of lasting interest. The scope of the journal includes all aspects of mass, momentum and energy exchange phenomena among different phases such as occur in disperse flows, gas–liquid and liquid–liquid flows, flows in porous media, boiling, granular flows and others. The journal publishes full papers, brief communications and conference announcements.