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| Full Citation |
| Material Information |
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Title: |
2.2.1 - Effect of surface tension on a single bubble bouncing at a free surface Particle Bubble and Drop Dynamics |
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Series Title: |
7th International Conference on Multiphase Flow - ICMF 2010 Proceedings |
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Physical Description: |
Conference Papers |
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Creator: |
Oyama, T.
Takeuchi, S.
Takagi, S.
Matsumoto, Y. |
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Publisher: |
International Conference on Multiphase Flow (ICMF) |
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Publication Date: |
June 4, 2010 |
| Subjects |
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Subject: |
bubble bouncing
contact time
restitution coefficient
front-tracking method |
| Notes |
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Abstract: |
The bouncing motion of air bubbles on a free surface is studied numerically. The deformations of both the free surface and the bubble are captured by means of a front-tracking method. Contact time is determined as the duration, within which the length between the mass center of the bubble and the initial position of the free surface is less than the initial bubble diameter. The contact time increases with decreasing surface tension coefficient that is well explained by a model prediction of the contact time. The contact time normalized by the bubble diameter and rise velocity is confirmed to be proportional to square of Weber number and independent of viscosity of the surrounding liquid. When the viscosity is high the restitution coefficient decreases with decreasing surface tension coefficient. When the viscosity is low the restitution coefficient is almost constant because the effect of surface tension becomes small. |
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General Note: |
The International Conference on Multiphase Flow (ICMF) first was held in Tsukuba, Japan in 1991 and the second ICMF took place in Kyoto, Japan in 1995. During this conference, it was decided to establish an International Governing Board which oversees the major aspects of the conference and makes decisions about future conference locations. Due to the great importance of the field, it was furthermore decided to hold the conference every three years successively in Asia including Australia, Europe including Africa, Russia and the Near East and America. Hence, ICMF 1998 was held in Lyon, France, ICMF 2001 in New Orleans, USA, ICMF 2004 in Yokohama, Japan, and ICMF 2007 in Leipzig, Germany. ICMF-2010 is devoted to all aspects of Multiphase Flow. Researchers from all over the world gathered in order to introduce their recent advances in the field and thereby promote the exchange of new ideas, results and techniques. The conference is a key event in Multiphase Flow and supports the advancement of science in this very important field. The major research topics relevant for the conference are as follows: Bio-Fluid Dynamics; Boiling; Bubbly Flows; Cavitation; Colloidal and Suspension Dynamics; Collision, Agglomeration and Breakup; Computational Techniques for Multiphase Flows; Droplet Flows; Environmental and Geophysical Flows; Experimental Methods for Multiphase Flows; Fluidized and Circulating Fluidized Beds; Fluid Structure Interactions; Granular Media; Industrial Applications; Instabilities; Interfacial Flows; Micro and Nano-Scale Multiphase Flows; Microgravity in Two-Phase Flow; Multiphase Flows with Heat and Mass Transfer; Non-Newtonian Multiphase Flows; Particle-Laden Flows; Particle, Bubble and Drop Dynamics; Reactive Multiphase Flows |
| Record Information |
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Bibliographic ID: |
UF00102023 |
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Volume ID: |
VID00043 |
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Source Institution: |
University of Florida |
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Holding Location: |
University of Florida |
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Rights Management: |
All rights reserved by the source institution and holding location. |
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Resource Identifier: |
221-Oyama-2010ICMF.pdf |
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