Osmotic flow in porous membranes: effects of electric charge

Takeshi Akinaga, Masako Sugihara-Seki, Tomoaki Itano

Research output: Contribution to journalArticlepeer-review


The electrostatic model for osmotic flow across a porous membrane in our previous study (Akinaga et al. 2008)" was extended to include the streaming potential, for solutes and pores of like charge and fixed surface charge densities. The magnitude of the streaming potential was determined to satisfy zero current condition along the pore axis. It was found that the streaming potential affects the velocity profiles of the pressure driven flow as well as the osmotic flow through the pore, and decreases their flow rates, particularly in the case of large Debye length relative to the pore radius, whereas it has little effect on the reflection coefficients of spherical solutes through cylindrical pores.
Original languageEnglish
Pages (from-to)261-270
Number of pages10
JournalTheoretical and Applied Mechanics Japan
Publication statusPublished - 2010


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