Characterization of Droplet Collision and Breakup on a Hemispherical Target

IF 3.8 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Prakasha Chandra Sahoo, Jnana Ranjan Senapati, Basanta Kumar Rana
{"title":"Characterization of Droplet Collision and Breakup on a Hemispherical Target","authors":"Prakasha Chandra Sahoo, Jnana Ranjan Senapati, Basanta Kumar Rana","doi":"10.1021/acs.iecr.4c02358","DOIUrl":null,"url":null,"abstract":"In the present work, simulation results are obtained to characterize the liquid drop impingement and pinch-off mechanism on a hemispherical substrate. Several critical stages are anticipated during the entire impact process. Various nondimensional parameters, including the diameter ratio (<i>D</i><sub><i>h</i></sub>/<i>D</i><sub><i>o</i></sub>), contact angle (θ), Ohnesorge number (<i>Oh</i>), Bond number (<i>Bo</i>), and Weber number (<i>We</i>), are implemented in the characterization of fluidic mechanisms involved in collision, spreading, and detachment with the solid stationary target. We have furnished numerical phase contours to comprehend qualitatively the fluidic behavior of liquid mass during the entire collision cycle. We have characterized the maximum deformation factor (β<sub><i>f</i>, <i>max</i></sub>) by considering the above-mentioned pertinent quantities. There is a discernible increasing trend in β<sub><i>f</i>, <i>max</i></sub> as <i>We</i> gradually increases for a given θ and <i>D</i><sub><i>h</i></sub>/<i>D</i><sub><i>o</i></sub>. Again, β<sub><i>f</i>, <i>max</i></sub> constantly reduces as the value of <i>Oh</i> grows for a given value of <i>We</i> and <i>D</i><sub><i>h</i></sub>/<i>D</i><sub><i>o</i></sub>. Again, the value of entrapped gaseous volume (<i>V</i>*) constantly drops down as the surface becomes hydrophilic to superhydrophobic for a given value of <i>We</i>. We have strived to generate a regime plot on the <i>Oh</i>–<i>We</i> plane for different <i>D</i><sub><i>h</i></sub>/<i>D</i><sub><i>o</i></sub> and contact angles to address the distinguished zones based on the entrapped gaseous bubble. Efforts are also made to develop a correction for β<sub><i>f</i>, <i>max</i></sub>. The developed correlation strongly agrees with the simulated predictions to within ±7%. Lastly, a theoretical model is devised to forecast the deformation factor, demonstrating near-match with the numerical outcomes.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"12 1","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial & Engineering Chemistry Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1021/acs.iecr.4c02358","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0

Abstract

In the present work, simulation results are obtained to characterize the liquid drop impingement and pinch-off mechanism on a hemispherical substrate. Several critical stages are anticipated during the entire impact process. Various nondimensional parameters, including the diameter ratio (Dh/Do), contact angle (θ), Ohnesorge number (Oh), Bond number (Bo), and Weber number (We), are implemented in the characterization of fluidic mechanisms involved in collision, spreading, and detachment with the solid stationary target. We have furnished numerical phase contours to comprehend qualitatively the fluidic behavior of liquid mass during the entire collision cycle. We have characterized the maximum deformation factor (βfmax) by considering the above-mentioned pertinent quantities. There is a discernible increasing trend in βfmax as We gradually increases for a given θ and Dh/Do. Again, βfmax constantly reduces as the value of Oh grows for a given value of We and Dh/Do. Again, the value of entrapped gaseous volume (V*) constantly drops down as the surface becomes hydrophilic to superhydrophobic for a given value of We. We have strived to generate a regime plot on the OhWe plane for different Dh/Do and contact angles to address the distinguished zones based on the entrapped gaseous bubble. Efforts are also made to develop a correction for βfmax. The developed correlation strongly agrees with the simulated predictions to within ±7%. Lastly, a theoretical model is devised to forecast the deformation factor, demonstrating near-match with the numerical outcomes.

Abstract Image

半球形目标上液滴碰撞和破裂的特征描述
在本研究中,我们获得了模拟结果,以描述液滴在半球形基底上的撞击和挤压机制。在整个撞击过程中,预计会出现几个关键阶段。在描述液滴与固体静止目标碰撞、扩散和脱离的流体机制时,采用了各种非尺寸参数,包括直径比 (Dh/Do)、接触角 (θ)、奥内索尔格数 (Oh)、邦德数 (Bo) 和韦伯数 (We)。我们提供了数值相位轮廓,以定性地理解液态物质在整个碰撞周期中的流体行为。通过考虑上述相关量,我们确定了最大变形系数 (βf,max) 的特征。在给定的 θ 和 Dh/Do 条件下,随着 We 的逐渐增大,βf, max 有明显的增大趋势。同样,在给定 We 和 Dh/Do 值的情况下,随着 Oh 值的增加,βf, max 不断减小。同样,在给定 We 值的情况下,随着表面从亲水到超疏水,夹带气体体积(V*)值不断下降。我们努力在不同的 Dh/Do 和接触角下生成 Oh-We 平面上的制度图,以解决根据夹带气泡区分区域的问题。我们还努力对 βf, max 进行修正。所开发的相关性与模拟预测非常吻合,误差在 ±7% 以内。最后,设计了一个理论模型来预测变形系数,结果显示与数值结果接近吻合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信