Imperfect Hele - Shaw cells
- 1 January 1986
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 47 (9) , 1541-1546
- https://doi.org/10.1051/jphys:019860047090154100
Abstract
The covering surfaces of a Hele-Shaw cell may be roughened mechanically, or modified by random chemical patches which change the wetting properties. We discuss first the quasi-static injection of a single fluid (with a finite contact angle θe) in an imperfect cell. The shape of the injected region depends critically on a dimensionless number i (ratio of the boundary energy τ over the capillary energy fluctuations in one patch). At τKeywords
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