Electrical effect on the osmotic flow through narrow channels

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  • 微小流路内の浸透流に及ぼす電荷の影響
  • Electrostatic analysis for osmotic flow through rectangular channels

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Abstract

As a basis to understand the contribution of electrical charges to the transport property of the microvessel wall, we have developed an electrostatic model for osmotic flow through narrow channels with surface charges in the presence of charged solutes. The interaction energy between surface charges was used to express the osmotic reflection coefficient as a function of the surface charges, the ion concentration of the fluid, and the size ratio of the solute and the channel. Our model predicts that even for small Debye length compared to the channel size, the surface charges could significantly increase the osmotic reflection coefficient, when the charges of the solute and the channel have the same sign.

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