运动液滴撞击静止液滴的动力学实验研究

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-02-01 DOI:10.47176/jafm.17.02.2141

D. Chen, L. Ming, T. Wang, M. Qiu, †. Z.Lin

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引用次数: 0

摘要

液滴撞击液滴的现象在许多领域都很常见，包括化学、核能和航空航天工业。本文利用高速摄影技术获得了液滴与不同大小的无柄液滴碰撞时所表现出的变化规律和演化特性。我们进一步探讨了韦伯数（We）和体积比（V p / V i）如何影响液滴与无柄液滴碰撞的行为。液滴撞击不同体积的无柄液滴的现象与液滴撞击液膜的现象不同。就液滴扩散、压缩和非飞溅液冠而言，本研究报告的现象和规律适用于 1 ≤ We ≤ 165 和液滴体积比为 1 ≤ V p / V i ≤ 6 的情况。当韦伯数较低时，液滴会向下压缩变形，而不会在碰撞初期凝聚。高韦伯数会导致液冠不飞溅。这些发现为了解液滴与液滴之间的相互作用动力学提供了重要启示。

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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Experimental Study on the Dynamics of a Moving Droplet Impacting a Sessile Droplet

The phenomenon of droplets impacting droplets is common in many fields including the chemical, nuclear, and aerospace industries. In this paper, high-speed photography technology is used to obtain the variation law and evolution properties exhibited by droplets colliding with sessile droplets of varying sizes. We further explored how the Weber number ( We ) and volume ratio ( V p / V i ) influence the behavior of droplets colliding with sessile droplets. The phenomenon of droplets impacting sessile droplets of different volumes is different from that of droplets impacting liquid films. In terms of droplet spreading, compression and the non-splashing liquid crown, the phenomena and laws reported in the present study are applicable for 1 ≤ We ≤ 165 and droplet volume ratios of 1 ≤ V p / V i ≤ 6. With a low Weber number, the droplet compresses and deforms downward without coalescence at the initial stage of collision. A high Weber number results in a no-splashing liquid crown. These findings provide important insights into the dynamics of droplet-droplet interactions.

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .