Impact Characteristics of a Carbonated Water Droplet on Hydrophobic Surface

Abba Abdulhamid Abubakar, Bekir Sami Yilbas*, Hussain Al-Qahtani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Carbonated water drops impact on a hydrophobic surface is examined. The influence of CO2 gas bubbles in droplet fluid on impacting droplet characteristics, such as spreading rates and restitution coefficient, are explored. The predictions of droplet wetting diameter and spreading rates are validated through the experimental data obtained from highspeed recording. The findings reveal that predictions agree well with the experimental data. CO2 gas bubbles in the droplet are compressed by the total impact pressure of the droplet liquid while slightly reducing the gas bubble sizes. The small size of close by bubbles at high pressure can merge forming large size bubbles, which occur toward the end of droplet spreading and retraction periods. The pressure increase in the fluid gives rise to the increased vertical height of the droplet and slightly reduces the droplet contact diameter on the impacted surface. The work done during the compression of CO2 gas in bubbles lowers the restitution coefficient of the droplet after the retraction period.

Original languageEnglish
Article number011402
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number1
StatePublished - Jan 2022

Bibliographical note

Publisher Copyright:
Copyright © 2022 by ASME


  • carbonated water droplet
  • gas bubbles
  • hydrophobic surface
  • impact

ASJC Scopus subject areas

  • Mechanical Engineering


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