Session NC: Microfluidics: Electrophoresis and Electroosmosis II
11:01 AM–1:37 PM, Tuesday, November 22, 2005
Hilton Chicago Room: Grand Ballroom
Chair: Sandip Ghosal, Northwestern University
Abstract ID: BAPS.2005.DFD.NC.9
Abstract: NC.00009 : Mathematical Modeling of Electroosmotic Flow in Micro/Nanonozzles
12:45 PM–12:58 PM
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Abstract 
Authors:
Pradeep Gnanaprakasam
A.T. Conlisk
Xin Hu
L.J. Lee
(The Ohio State University)
Electroosmotic flow in micro/nano nozzles is important in many applications for example in patch clamps for studying ion channel currents. Nanonozzles are also manufactured from micronozzles by a process in which a solution is pumped into a micro-nozzle electroosmotically to deposit a material from the solution on the inner walls of the channel, thus reducing the dimension of the channel to the nano-scale ranges. A mathematical model is developed for electroosmotic flow in a micro/nano nozzle. The flow through the nanonozzle is calculated first using the lubrication approximation and those results are compared with a full two dimensional steady simulation. The velocity field is composed of an electroosmotic component and a pressure driven component. The pressure gradient is set up by the electroosmotic driving force coupled with the converging/diverging channel profile. Results for the concentration distribution, velocity and potential distribution in the nanonozzle are presented.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.DFD.NC.9