Geller, A. S. and Lee, S. H. and Leal, L. G. (1986) The creeping motion of a spherical particle normal to a deformable interface. Journal of Fluid Mechanics, 169 . pp. 27-69. ISSN 0022-1120. http://resolver.caltech.edu/CaltechAUTHORS:20120627-074206046
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Numerical results are presented for the approach of a rigid sphere normal to a deformable fluid-fluid interface in the velocity range for which inertial effects may be neglected. Both the case of a sphere moving with constant velocity, and that of a sphere moving under the action of a constant non-hydrodynamic body force are considered for several values of the viscosity ratio, density difference and interfacial tension between the two fluids. Two distinct modes of interface deformation are demonstrated: a film drainage mode in which fluid drains away in front of the sphere leaving an ever-thinning film, and a tailing mode where the sphere passes several radii beyond the plane of the initially undeformed interface, while remaining encapsulated by the original surrounding fluid which is connected with its main body by a thin thread-like tail behind the sphere. We consider the influence of the viscosity ratio, density difference, interfacial tension and starting position of the sphere in deter-mining which of these two modes of deformation will occur.
|Additional Information:||© 1986 Cambridge University Press. Received 20 September 1985 and in revised form 20 December 1985. Published online: 21 April 2006.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||27 Jun 2012 17:13|
|Last Modified:||26 Dec 2012 15:24|
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