Dynamics of binary droplet collisions

IF 37 1区工程技术 Q1 ENERGY & FUELS

Progress in Energy and Combustion Science Pub Date : 2025-09-25 DOI:10.1016/j.pecs.2025.101252

Chengming He , Peng Zhang , Chung K. Law

引用次数: 0

Abstract

Binary droplet collisions, relevant for various natural phenomena and technological processes, embodies a rich fluid-dynamical platform covering a wide range of physical scales. This review begins with the collision between two identical droplets to reveal the underlying physics of the transition between droplet coalescence, bouncing, and separation. The interplay between the macroscopic droplet motion, the internal flow, and the microscopic interfacial gas film dynamics involving rarefied flow and van der Waals molecular force reflect the essential multi-scale and multi-physics characteristics of the collision dynamics. The review then discusses the collision between unequal-sized droplets, non-Newtonian fluids, dissimilar fluids, and the analogical jet-jet collisions. Fundamental understanding on the basic binary droplet collisions phenomena and its inference on practical processes is emphasized.

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二元液滴碰撞动力学

二元液滴碰撞与各种自然现象和技术过程有关，体现了一个涵盖广泛物理尺度的丰富的流体动力学平台。本综述从两个相同液滴之间的碰撞开始，揭示液滴合并，弹跳和分离之间转变的基本物理。宏观的液滴运动、内部流动和微观的稀薄流动和范德华分子力的界面气膜动力学之间的相互作用反映了碰撞动力学本质上的多尺度和多物理场特征。然后讨论了不等大小的液滴、非牛顿流体、异种流体之间的碰撞，以及类似的喷射-喷射碰撞。强调对基本二元液滴碰撞现象的基本认识及其对实际过程的推论。

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

Progress in Energy and Combustion Science 工程技术-工程：化工

CiteScore

59.30

自引率

0.70%

发文量

审稿时长

3 months

期刊介绍： Progress in Energy and Combustion Science (PECS) publishes review articles covering all aspects of energy and combustion science. These articles offer a comprehensive, in-depth overview, evaluation, and discussion of specific topics. Given the importance of climate change and energy conservation, efficient combustion of fossil fuels and the development of sustainable energy systems are emphasized. Environmental protection requires limiting pollutants, including greenhouse gases, emitted from combustion and other energy-intensive systems. Additionally, combustion plays a vital role in process technology and materials science. PECS features articles authored by internationally recognized experts in combustion, flames, fuel science and technology, and sustainable energy solutions. Each volume includes specially commissioned review articles providing orderly and concise surveys and scientific discussions on various aspects of combustion and energy. While not overly lengthy, these articles allow authors to thoroughly and comprehensively explore their subjects. They serve as valuable resources for researchers seeking knowledge beyond their own fields and for students and engineers in government and industrial research seeking comprehensive reviews and practical solutions.