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雾化与喷雾

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ISSN 打印: 1044-5110

ISSN 在线: 1936-2684

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Indexed in

MODELING OF WATER DROP IMPACTIONS IN THE LEIDENFROST REGIME

卷 26, 册 9, 2016, pp. 853-888
DOI: 10.1615/AtomizSpr.2015013386
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摘要

Experiments of monosized water drop train impingement on a surface heated well above the Leidenfrost temperature are used to derive empirical and semi empirical models describing the dynamics of the reemited drops for the general case of non-normal impacts. The experimental setup combines shadowgraphy with high-speed imaging to obtain both the size and trajectories of the reemited drops. The obtained data are analyzed to describe the impact dynamics and the properties of the reemited drops: contact time, maximum spread diameter and reemited velocities for the rebound regime, drop diameter and velocity distributions in the splashing regime. In the rebound regime, good agreement of the present experimental data with theoretical predictions of the literature based on a mechanical spring-mass analogy is observed. In the splashing regime, the arithmetic drop diameter distribution appears to evolve from a multimodal distribution at the rebound splashing threshold towards a single mode distribution. For both the rebound and splashing regimes, the initial velocity component tangential to the impinged surface is damped proportionally to the normal Weber number. In the splashing regime, the average velocity of the reemited drops normal to the surface appears almost independent of the normal impact Weber number when normalized by its initial value.

对本文的引用
  1. Patterson Colin J, Shiri Samira, Bird James C, Macrotextured spoked surfaces reduce the residence time of a bouncing Leidenfrost drop, Journal of Physics: Condensed Matter, 29, 6, 2017. Crossref

  2. Ma Tianyu, Feng Lei, Wang Hu, Liu Haifeng, Yao Mingfa, A numerical study of spray/wall impingement based on droplet impact phenomenon, International Journal of Heat and Mass Transfer, 112, 2017. Crossref

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  4. Wang Lingzi, Feng Jianmei, Dang Tiendat, Peng Xueyuan, Effects of the surface roughness on the entrainment heights of oil–gas mixture impingement on the vertical wall, Chemical Engineering Science, 229, 2021. Crossref

  5. Piskunov Maxim, Breitenbach Jan, Schmidt J. Benedikt, Strizhak Pavel, Tropea Cameron, Roisman Ilia V., Secondary atomization of water-in-oil emulsion drops impinging on a heated surface in the film boiling regime, International Journal of Heat and Mass Transfer, 165, 2021. Crossref

  6. Schmidt J. Benedikt, Hofmann Julian, Tenzer Fabian M., Breitenbach Jan, Tropea Cameron, Roisman Ilia V., Thermosuperrepellency of a hot substrate caused by vapour percolation, Communications Physics, 4, 1, 2021. Crossref

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