Quasi-static bubble formation on submerged orifices

Gerlach, D. ; Biswas, G. ; Durst, F. ; Kolobaric, V. (2005) Quasi-static bubble formation on submerged orifices International Journal of Heat and Mass Transfer, 48 (2). pp. 425-438. ISSN 0017-9310

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2004.09.002


The static formation of air bubbles emanating from a submerged orifice was analyzed based on the principles of force balance. The analysis was corroborated by experiments using a shadow imaging technique. The influence of the Young contact angle of the three material components was investigated by identifying two modes of formation, corresponding to bubble formation at the orifice rim and spreading of the bubble base on the horizontal surface around the bubble. The characteristics of the formation process such as shape, height and volume of the bubble and the non-dimensional pressure difference at the orifice are given for both modes up to the critical equilibrium, defined by the maximum bubble volume, at which the bubble releases dynamically.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Bubble Formation; Submerged Orifices; Aeration by Bubbles
ID Code:59856
Deposited On:07 Sep 2011 14:27
Last Modified:07 Sep 2011 14:27

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