Numerical investigation of upstream pressure fluctuation during growth and breakup of pendant drops

Zhizhao Che, Teck Neng Wong, Nam Trung Nguyen, Yit Fatt Yap, J. C. Chai

Research output: Contribution to journalArticle

9 Citations (Scopus)


Growth and breakup of pendant drops from the tip of a capillary is of great importance due to its wide applications and the richness of the underlying physics. During the growth and breakup of a pendant drop, the size variation will produce pressure fluctuation in the upstream, which is studied numerically with the level set method to predict the interface. The numerical results are validated against experimental images showing the growth and breakup of pendant drops obtained from a high speed camera. The effects of the surface tension and the outer diameter of the capillary on the amplitude and the period of the pressure fluctuation are examined. Compared to other methods of surface tension measurement, this method shows potential advantages of its good accuracy, simplicity, and low cost.

Original languageEnglish
Pages (from-to)5293-5300
Number of pages8
JournalChemical Engineering Science
Issue number21
Early online date23 Jul 2011
Publication statusPublished - 1 Nov 2011
Externally publishedYes


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