Please use this identifier to cite or link to this item:
Title: Effect of the viscosity on the behavior of a single bubble near a membrane
Authors: Hajizadeh Aghdam, A.
Ohl, S.W.
Khoo, B.C. 
Shervani-Tabar, M.T.
Nobari, M.R.H.
Keywords: Membrane
Non-equilibrium bubble
Viscous liquids
Issue Date: Dec-2012
Citation: Hajizadeh Aghdam, A., Ohl, S.W., Khoo, B.C., Shervani-Tabar, M.T., Nobari, M.R.H. (2012-12). Effect of the viscosity on the behavior of a single bubble near a membrane. International Journal of Multiphase Flow 47 : 17-24. ScholarBank@NUS Repository.
Abstract: In this paper we experimentally investigate the effect of liquid viscosity on the behavior of a spark generated bubble which is placed closely on top of a thin elastic boundary (membrane). We describe with details the final stages of the bubble-membrane interaction. The spark generated bubble undergoes natural oscillations. There is no imposed external field. The range of maximum bubble radii is between 3.3 mm ≤ R m≤ 4.9 mm. The bubble at its collapse phase takes on a 'mushroom' shape and then splits into two small bubbles. The small bubble which is nearer to the membrane forms a jet towards the membrane while the top bubble jets away. The jet velocity towards the membrane is higher than that away from it. This forward jet could even penetrate through a soft membrane. An increase in the liquid viscosity leads to a decrease in the velocity of the jets. Bubbles in high viscosity liquid oscillate more cycles before disintegrating than those in low viscosity liquid such as water. The effect of the distance of the bubble center from the initial position of the membrane in liquid of different viscosities is also studied. The results show that when the ratio of the distance between the bubble center and the membrane to the maximum radius of the bubble is more than 0.9, no jet is observed and the bubble collapses spherically. © 2012 Elsevier Ltd.
Source Title: International Journal of Multiphase Flow
ISSN: 03019322
DOI: 10.1016/j.ijmultiphaseflow.2012.06.010
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Oct 22, 2020


checked on Oct 22, 2020

Page view(s)

checked on Oct 23, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.