Abstract
Electroosmosis phenomenon in porous media finds widespread applications in various fields such as microfluidic systems, polymer electrolyte membrane fuel cells, oil and gas engineering, wastewater sludge dewatering and groundwater dynamics etc. Therefore, the electroosmotic flow mechanism in porous media have attracted broad interests from multiple disciplines. This paper provides an overview on the physical mechanisms and mathematical models for electroosmosis in porous media. The background of electric double layer theory and state-of-art research progress on pore-scale models for electroosmotic flow through porous media are reviewed. Two typical and significant research topics, electroosmosis under pressure coupling effect and nanoscale electroosmotic phenomena, are then focused on. The advances in theoretical analysis, numerical simulation and experimental measurements are summarized. Finally, the potential research directions for the electroosmotic flow in porous media are addressed out.
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