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Findings in Fluid Mechanics Reported from University of Cambridge (Electro-osmotic flow through a nanopore)

July 29, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Fluid Mechanics have been published. According to news reporting out of Cambridge, United Kingdom, by VerticalNews editors, research stated, "Electro-osmotic pumping of fluid through a nanopore that traverses an insulating membrane is considered. The density of surface charge on the membrane is assumed to be uniform and sufficiently low for the Poisson-Boltzmann equation to be linearized."

Our news journalists obtained a quote from the research from the University of Cambridge, "The reciprocal theorem gives the flow rate generated by an applied weak electric field, expressed as an integral over the fluid volume. For a circular hole in a membrane of zero thickness, an analytical result is possible up to quadrature. For a membrane of arbitrary thickness, the full Poisson-Nernst-Planck-Stokes system of equations is solved numerically using a finite volume method. The numerical solution agrees with the standard analytical result for electro-osmotic flux through a long cylindrical pore when the membrane thickness is large compared to the hole diameter."

According to the news editors, the research concluded: "When the membrane thickness is small, the flow rate agrees with that calculated using the reciprocal theorem."

For more information on this research see: Electro-osmotic flow through a nanopore. Journal of Fluid Mechanics, 2014;749():167-183. Journal of Fluid Mechanics can be contacted at: Cambridge Univ Press, 32 Avenue Of The Americas, New York, NY 10013-2473, USA. (Cambridge University Press -; Journal of Fluid Mechanics -

Our news journalists report that additional information may be obtained by contacting M. Mao, University of Cambridge, Dept. of Appl Math & Theoret Phys, Cambridge CB3 0WA, United Kingdom. Additional authors for this research include J.D. Sherwood and S. Ghosal.

Keywords for this news article include: Cambridge, United Kingdom, Europe, Fluid Mechanics

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Source: Journal of Technology

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