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Received November 6, 2013
Accepted February 21, 2014
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Influence of fluid properties on bubble formation, detachment, rising and collapse; Investigation using volume of fluid method
Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran 1Faculty of Engineering and Built Environment, The University of Newcastle, Australia
peimanzahedi@gmail.com
Korean Journal of Chemical Engineering, August 2014, 31(8), 1349-1361(13), 10.1007/s11814-014-0063-x
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Abstract
Numerical simulations have been carried out to investigate the formation and motion of single bubble in liquids using volume-of-fluid (VOF) method using the software platform of FLUENT 6.3. Transient conservation mass and momentum equations with considering the effects of surface tension and gravitational force were solved by the pressure implicit splitting operator (PISO) algorithm to simulate the behavior of gas.liquid interface movements in the VOF method. The simulation results of bubble formation and characteristics were in reasonable agreement with_x000D_
experimental observations and available literature results. Effects of fluid physical properties, operation conditions such as orifice diameter on bubble behavior, detachment time, bubble formation frequency and bubble diameter were numerically studied. The simulations showed that bubble size and bubble detachment times are linear functions of surface tension and decrease exponentially with the increase in liquid density. In contrast, only a small influence of the fluid_x000D_
viscosity on bubble size and detachment time was observed. Bubble collapse at a free surface simulation with VOF method was also investigated.
Keywords
References
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Ashgriz N, Poo JY, J. Comput. Phys., 93, 449 (1991)
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Brackbill JU, Kothe DB, Zemach C, J. Comput. Phys., 100, 335 (1992)
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Delnoij E, Kuipers JA, Vanswaaij WP, Chem. Eng. Sci., 52(21-22), 3759 (1997)
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Bhaga D, Weber ME, J. Fluid Mech., 105, 61 (1981)
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