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Electroosmotic Phenomena in Fractures

✍ Scribed by S. Marino; D. Coelho; S. Békri; P.M. Adler

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
330 KB
Volume
223
Category
Article
ISSN
0021-9797

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✦ Synopsis

Electroosmotic phenomena in fractures have been investigated in the linear limit for various double-layer thicknesses. The effects of the geometrical parameters were systematically studied for deterministic sinusoidal and random self-affine fractures. The numerical results show a definite influence of the surface amplitude on electroosmotic processes. For self-affine fractures, the roughness or Hurst exponent has a much larger incidence than the correlation parameter between the two surfaces. All the electroosmotic coupling coefficients can be gathered in a single relationship which depends on a characteristic length scale Lambda, applicable to every configuration. Such a length was already found useful for porous media, but the relationship is different. Copyright 2000 Academic Press.

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