Stoos, J. A. and Leal, L. G. (1990) A spherical particle straddling a fluid/gas interface in an axisymmetric straining flow. Journal of Fluid Mechanics, 217 . pp. 263-298. ISSN 0022-1120 http://resolver.caltech.edu/CaltechAUTHORS:20120509-154306915
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Numerical solutions, obtained via the boundary-integral technique, are used to consider the effect of a linear axisymmetric straining flow on the existence of steady-state configurations in which a neutrally buoyant spherical particle straddles a gas–liquid interface. The problem is directly applicable to predictions of the stability of particle capture in flotation processes, and is also of interest in the context of contact angle and surface tension measurements. A primary goal of the present study is a determination of the critical capillary number, Ca_c, beyond which an initially captured particle is pulled from the interface by the flow, and the dependence of Ca_c on the equilibrium contact angle θ_c. We also present equilibrium configurations for a wide range of contact angles and subcritical capillary numbers.
|Additional Information:||© 1990 Cambridge University Press. Received 4 May 1989 and in revised form 9 January 1990. Published Online April 26 2006.|
|Official Citation:||J. A. Stoos and L. G. Leal (1990). A spherical particle straddling a fluid/gas interface in an axisymmetric straining flow. Journal of Fluid Mechanics, 217 , pp 263-298 doi:10.1017/S0022112090000726|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||10 May 2012 14:51|
|Last Modified:||26 Dec 2012 15:11|
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