Experiment on the dynamics of a compound drop impinging on a hot surface

Sheng Lin Chiu, Ta Hui Lin

研究成果: Article同行評審

39 引文 斯高帕斯(Scopus)

摘要

A stable stream of compound drops which are composed of core fluid, water, encased by a layer of shell fluid, diesel, was utilized to investigate the dynamic behavior of a liquid-liquid compound drop impinging on a hot surface above the Leidenfrost temperature. The core-to-shell mass ratio and the modified normal Weber number, which takes into account the two interfaces involved, were taken to be the controlling parameters. The outcomes of a compound drop impacting on a hot surface consist largely of reflection with or without secondary drops. Based on energy conservation, the dissipated energy was estimated and a criterion for secondary drop formation was presented. The normal velocity after impact is reduced due to viscous dissipation while the tangential component remains almost unaffected. In addition, there is an interesting phenomenon of the core drop escaping from the compound drop. The experimental results show that an increasing core-to-shell mass ratio raises the momentum loss, reduces the number of secondary drops, and promotes core-drop escaping.

原文English
文章編號122103
頁(從 - 到)1-9
頁數9
期刊Physics of Fluids
17
發行號12
DOIs
出版狀態Published - 2005 十二月

All Science Journal Classification (ASJC) codes

  • 計算力學
  • 凝聚態物理學
  • 材料力學
  • 機械工業
  • 流體流動和轉移過程

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