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Free Surface Modeling Using CFD: Bubble Bursting

Nur Fatin bte Alias, Nur Fatin (2010) Free Surface Modeling Using CFD: Bubble Bursting. Universiti Teknologi Petronas, Sri Iskandar,Tronoh,Perak. (Unpublished)

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Abstract

Bubble bursting is a process where bubble rises up to a surface of a liquid and experiences bubble film breaks and liquid jet. Invisible to the naked eyes, these two events produce droplets known as film drops and jet drops. There are a lot of industrial problems that are pertinent to these droplets and these problems are very important to be properly handled as they can affect the working environment and workers’ health. Realizing the importance of bubble bursting phenomenon, this project has the objective to capture the bubble bursting mechanisms by using CFD and to study the effect of surface tension and initial bubble diameter on bubble bursting mechanism. CFD package that is used in this study is FLUENT 12.0 and the tracking method used is Volume-of- Fluid (VOF). The cases are run for two different surface tension which are 1.2 N/m and 1.4 N/m and two different initial bubble diameter which are 11.5 mm and 9.3 mm. In terms of bubble bursting, the main events of this phenomenon have been captured successfully by CFD where the disintegration of bubble cap and production of liquid jet are observed. However in terms of film and jet droplets formation, this simulation does not show any formation of droplets from the bubble bursting causing no conclusion can be made to relate direct relation between surface tension and initial bubble diameter to the formation of droplets. Improvement can be made to have finer mesh to capture possible formation of droplets in the system

Item Type: Final Year Project
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 5 not found.
Date Deposited: 03 Nov 2011 11:23
Last Modified: 25 Jan 2017 09:43
URI: http://utpedia.utp.edu.my/id/eprint/1158

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