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Flow Kinetics in Porous Ceramics: Understanding with Non-Uniform Capillary Models

Debdutt, Patro and Bhattacharyya, Saswata and Vikram, Jayaram (2007) Flow Kinetics in Porous Ceramics: Understanding with Non-Uniform Capillary Models. In: Journal of the American Ceramic Society, 90 (10). pp. 340-346.


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The present work describes the development of a two-parameter non-uniform capillary model to describe kinetics of flow in porous solids with complex tortuous varying paths. Experimentally, the rate of fluid flow in such a non-uniform capillary is found to be orders of magnitude slower compared with a corresponding average uniform capillary. This slow rate is explained in terms of an extremely small 'effective' hydrodynamic radius. The origin of such an 'unphysical' radius is rationalized based on geometrical considerations and effective driving forces for flow through a stepped capillary. Infiltration rate parameters are derived from the geometry of the porous medium for both wetting and non-wetting conditions.

Item Type: Journal Article
Publication: Journal of the American Ceramic Society
Publisher: Blackwell Publishing
Additional Information: Copyright of this article belongs to Blackwell Publishing.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 29 Jul 2008
Last Modified: 19 Sep 2010 04:48
URI: http://eprints.iisc.ac.in/id/eprint/15325

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