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Journal of Porous Media
Импакт фактор: 1.49 5-летний Импакт фактор: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Печать: 1091-028X
ISSN Онлайн: 1934-0508

Выпуски:
Том 22, 2019 Том 21, 2018 Том 20, 2017 Том 19, 2016 Том 18, 2015 Том 17, 2014 Том 16, 2013 Том 15, 2012 Том 14, 2011 Том 13, 2010 Том 12, 2009 Том 11, 2008 Том 10, 2007 Том 9, 2006 Том 8, 2005 Том 7, 2004 Том 6, 2003 Том 5, 2002 Том 4, 2001 Том 3, 2000 Том 2, 1999 Том 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v15.i8.60
pages 775-783

A GENERAL FORMULA FOR CAPILLARY SUCTION-PRESSURE IN POROUS MEDIA

Reza Masoodi
Assistant Professor
Krishna Pillai
Mechanical Engineering Department EMS Building, 3200 N. Cramer Street, Room 945 College of Engineering and Applied Science University of Wisconsin, Milwaukee,WI 53211

Краткое описание

Imbibition or injection of a liquid into a porous medium is often modeled as a fully saturated flow behind a clearly defined liquid front. In such a quasi-steady moving-boundary problem, the capillary pressure is needed as a pressure boundary condition on the liquid front to pull the front along during such an imbibition/injection process. A simple, general formula has been developed for the capillary suction-pressure in porous media, which relates the capillary pressure to the microstructure of various porous media. The energy-balance principle is applied during the wicking process to develop this expression for the capillary pressure in a general porous medium. The proposed formula can be applied to both the homogeneous as well as inhomogeneous porous media. To validate the suggested theory, six different cases of the capillary pressure from the literature are considered. It is shown that the new formula leads to an identical expression for the capillary pressure for each of the studied cases. The proposed equation can also be used to estimate the capillary pressure from the micrographs of a porous medium.


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