图书馆订阅: Guest
雾化与喷雾

每年出版 12 

ISSN 打印: 1044-5110

ISSN 在线: 1936-2684

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00095 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

EXAMINING VISCOSITY AND SURFACE WETTABILITY ON LAMELLA LIFT DYNAMICS AND DROPLET SPLASHING

卷 21, 册 4, 2011, pp. 303-315
DOI: 10.1615/AtomizSpr.2011002818
Get accessGet access

摘要

The mechanisms that initiate splashing on smooth, dry surfaces are complex and differ from those on rough or prewetted surfaces. This form of splashing is greatly influenced by the surrounding gas pressure. In this work we examine the effects of droplet viscosity, surface wettability, and gas pressure on the splashing dynamics of single droplets. In previous studies droplet viscosity has been shown to both promote and inhibit splashing. In the current study this contradictory result is tested across a wide range of fluid viscosities. The impact energy required for splashing is minimized within a range of Reynolds number of ~100-500. Eventually, splashing appears to become impossible with sufficiently high viscosity due to the slowing of splashing dynamics beyond a certain time window of opportunity. Hydrophobic and hydrophilic coatings were also applied to a smooth surface in order to change the wetting characteristics of the water droplets. It was found that the hydrophilic surface required higher gas pressure (density) for splashing to occur and vice versa for the hydrophobic surface. Focusing on the spreading lamella, a momentum balance was derived with consideration of the chemical affinity or adhesive force of the liquid to the impact surface. The lamella lift from the surface was assumed to be induced by the displaced surrounding gas during spreading. This provides an explanation for the vertical velocity component of corona splashing seen on dry, smooth surfaces. In light of the lamella lift, instability within the spreading droplet is predicted to arise through Rayleigh-Taylor theory, and subsequent timescales of secondary drop formation are examined. By comparing splash thresholds on hydrophobic and hydrophilic surfaces, the effects of the adhesive force are demonstrated and quantified. The adhesive force between the lamella and impact surface plausibly explains the seemingly paradoxical effect of droplet viscosity to promote splashing for low-viscosity fluids.

对本文的引用
  1. Liang Gangtao, Mudawar Issam, Review of mass and momentum interactions during drop impact on a liquid film, International Journal of Heat and Mass Transfer, 101, 2016. Crossref

  2. Qin Mengxiao, Tang Chenglong, Tong Shangqing, Zhang Peng, Huang Zuohua, On the role of liquid viscosity in affecting droplet spreading on a smooth solid surface, International Journal of Multiphase Flow, 117, 2019. Crossref

  3. Liu Hong, Si Chao, Cai Chang, Zhao Chuanqi, Yin Hongchao, Experimental investigation on impact and spreading dynamics of a single ethanol–water droplet on a heated surface, Chemical Engineering Science, 229, 2021. Crossref

  4. Zhang Haixiang, Zhang Xiwen, Yi Xian, He Feng, Niu Fenglei, Hao Pengfei, Reversed role of liquid viscosity on drop splash, Physics of Fluids, 33, 5, 2021. Crossref

  5. Cai Chang, Si Chao, Liu Hong, Yin Hongchao, Influence of alcohol additive and surface temperature on impact and spreading characteristics of a single water droplet, International Journal of Heat and Mass Transfer, 180, 2021. Crossref

  6. Qin Mengxiao, Tang Chenglong, Guo Yang, Zhang Peng, Huang Zuohua, Subpatterns of Thin-Sheet Splash on a Smooth Surface, Langmuir, 36, 18, 2020. Crossref

Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集 订购及政策 Begell House 联系我们 Language English 中文 Русский Português German French Spain