Electro-osmotic coupling in compact clays

Details Electro-osmotic coupling in compact clays Electro-osmotic coupling in compact clays

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3118614r&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 18, CiteID L18614

Physics

4

Electromagnetics: Measurement And Standards, Electromagnetics: Numerical Methods, Electromagnetics: Random Media And Rough Surfaces, Physical Properties Of Rocks: Magnetic And Electrical Properties, Physical Properties Of Rocks: Permeability And Porosity

Scientific paper

Electro-osmotic coefficients are determined experimentally and compared to numerical data. The numerical model assumes random packings of grains of various shapes; the prediction corresponds to a modified analytical solution. A special set up was designed to measure all relevant properties independently as functions of the porosity and electrolyte concentration. Two model clays and a compact natural clay were used. Good agreement was found between experimental and numerical results, indicating that the electro-osmotic coefficient can be predicted from conductivity and permeability.

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