{"title":"HFE-7100 Droplet Interaction with a Superheated Surface","authors":"V. O. Sitnikov, E. Ya. Gatapova","doi":"10.1134/S1810232825010072","DOIUrl":null,"url":null,"abstract":"<p>The dynamics of HFE-7100 droplet interactions with a heated sapphire surface at superheat from 10 to 100°C for Weber numbers from 25 to 345 are considered. Top- and side-view visualizations are performed using a high-speed camera supplemented by a stereomicroscope. Top view images allow us to follow the transitions to different boiling regimes, as well as to observe bubble formation, bubble density, bubble clusters, bubble absence, and the transparency of the spreading droplet during levitation. While side view images show the rebound and levitation heights and angles. The rebound, the formation of a vapor layer, and the conditions under which the droplet levitates as the substrate temperature rises are studied. The formation of finger-like structures, which can then form secondary droplets, is observed for high We number values.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"34 1","pages":"74 - 83"},"PeriodicalIF":1.4000,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S1810232825010072","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The dynamics of HFE-7100 droplet interactions with a heated sapphire surface at superheat from 10 to 100°C for Weber numbers from 25 to 345 are considered. Top- and side-view visualizations are performed using a high-speed camera supplemented by a stereomicroscope. Top view images allow us to follow the transitions to different boiling regimes, as well as to observe bubble formation, bubble density, bubble clusters, bubble absence, and the transparency of the spreading droplet during levitation. While side view images show the rebound and levitation heights and angles. The rebound, the formation of a vapor layer, and the conditions under which the droplet levitates as the substrate temperature rises are studied. The formation of finger-like structures, which can then form secondary droplets, is observed for high We number values.
期刊介绍：
Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
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