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

doi:10.1016/j.ces.2011.07.028

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 journal › Article › peer-review

13 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	5293-5300
Number of pages	8
Journal	Chemical Engineering Science
Volume	66
Issue number	21
Early online date	23 Jul 2011
DOIs	https://doi.org/10.1016/j.ces.2011.07.028
Publication status	Published - 1 Nov 2011
Externally published	Yes

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10.1016/j.ces.2011.07.028

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abstract = "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.",

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AU - Che, Zhizhao

AU - Wong, Teck Neng

AU - Nguyen, Nam Trung

AU - Yap, Yit Fatt

AU - Chai, J. C.

PY - 2011/11/1

Y1 - 2011/11/1

N2 - 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.

AB - 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.

KW - Drop

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KW - Multiphase flow

KW - Numerical analysis

KW - Pinch-off

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

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