Puffing and Microexplosion Behavior of Water in Pure Diesel Emulsion Droplets During Leidenfrost Effect

Mohammed Yahaya Khan, A. Rashid A. Aziz, Morgan Heikal, Cyril Crua

Research output: Contribution to journalArticlepeer-review


The microexplosion evolution phenomenon of single droplets of water in pure diesel emulsion under Leidenfrost effect has been studied. The tested emulsions were stabilized with a blend of commercial surfactants with three different water contents of 9%, 12%, and 15%. A high speed camera synchronized with backlight technique was used to capture the evolution of microexplosion and puffing. Three different droplet diameters of approximately 2.6 mm, 2 mm, and 0.2 mm were analyzed. It was found that the tendency of microexplosion and puffing frequency was influenced by the droplet diameter. Coalescence was the dominating factor in inducing microexplosion in bigger droplets. It was observed that the child droplets ejected from the parent droplet undergoes further puffing processes. The size of the secondary droplets after microexplosion were also found to be slightly influenced by the parent droplet size.The waiting time for microexplosion and puffing were compared for different droplets size.
Original languageEnglish
Pages (from-to)1186-1197
Number of pages12
JournalCombustion Science and Technology
Issue number7
Publication statusPublished - 29 Dec 2016

Bibliographical note

This is an Accepted Manuscript of an article published by Taylor & Francis in Combustion Science and Technology on 29/12/2016, available online: http://www.tandfonline.com/10.1080/00102202.2016.1275593


  • Coalescence
  • Leidenfrost effect
  • Microexplosion
  • Sauter mean diameter (SMD)
  • Surfactant


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