Containerless Solidification of a Hollow Droplet with Forced Convection

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-09 DOI:10.1007/s12217-024-10112-0

Nang X. Ho, Binh D. Pham, Truong V. Vu

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Abstract

The phenomenon of solidified suspended hollow droplets is often run into industry and nature. In this study, we focus on the containerless solidification process of a hollow droplet undergoing a forcing flow. We found that when the radius ratio (R_io) varied with different growth angles, it changes the trend of the solidification rate of the solidifying front over time. Specifically, with the growth angle of 5° (i.e., Φ_gr = 5°), the suspended hollow droplets finished solidification in almost the same time for R_io in the range of 0.2–0.7. When we increase the growth angle by 5°, i.e., Φ_gr = 10°, the solidification time increases with the increase of R_io. Also following the increase of R_io, this increase in the solidification time is even higher for the growth angle Φ_gr = 15°. The inlet temperature is also considered. Obviously, increasing the inlet temperature increases the solidification time of the hollow droplets. In addition, when the Reynolds number increases, the solidification time of the droplets also tends to increase. However, the increment of this trend is different under different temperatures of the forcing flow.

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利用强制对流实现中空液滴的无容器凝固

工业和自然界中经常会出现悬浮空心液滴凝固的现象。在这项研究中，我们重点研究了空心液滴在强制流作用下的无容器凝固过程。我们发现，当半径比（Rio）随不同的生长角变化时，会改变凝固前沿的凝固速率随时间变化的趋势。具体来说，当生长角为 5°（即 Φgr = 5°）时，当 Rio 在 0.2-0.7 范围内时，悬浮空心液滴在几乎相同的时间内完成凝固。当我们将生长角增加 5°，即 Φgr = 10°时，凝固时间随着 Rio 的增加而增加。同样，随着 Rio 的增加，在生长角 Φgr = 15° 时，凝固时间的增加幅度更大。还考虑了入口温度。很明显，提高入口温度会增加空心液滴的凝固时间。此外，当雷诺数增加时，液滴的凝固时间也有增加的趋势。然而，在不同的强制流温度下，这一趋势的增量是不同的。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.