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Analytical approach for the Lucas-Washburn equation

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Author

Summary, in English

Porous media can be characterized by studying the kinetics of liquid rise within the pore spaces. Although porous media generally have a complex structure, they can be modeled as a single, vertical capillary or as an assembly of such capillaries. The main difficulties lie in separately estimating the effective mean radius of the capillaries and the contact angle between the liquid and the pore. In this paper we circumvent these obstacies by exploring another approach and suggest an analytical approach of the classical Lucas-Washburn equation (LWE). Specifically, we consider that the contact angle between the liquid meniscus and the inner surface of the capillary becomes a dynamic contact angle when the liquid front is in movement. It has previously been demonstrated that the resulting time dependence is due to frictional dissipation at the moving wetting front. (C) 2002 Elsevier Science (USA).

Department/s

Publishing year

2002

Language

English

Pages

415-421

Publication/Series

Journal of Colloid and Interface Science

Volume

250

Issue

2

Document type

Journal article

Publisher

Elsevier

Topic

  • Physical Chemistry

Keywords

  • dynamic contact angle
  • wetting-line fraction
  • capillary rise

Status

Published

ISBN/ISSN/Other

  • ISSN: 1095-7103