Spectral element based numerical solvers are developed to simulate electrokinetically
driven flows for micro-fluidic applications. Based on these numerical solvers,
basic phenomena and devices for electrokinetic applications in micro and nano flows
are systematically studied. As a first application, flow and species transport control
in a grooved micro-channel using local electrokinetic forces are studied. Locally
applied electric fields, zeta potential patterned grooved surfaces, and geometry are
manipulated to control mixed electroosmotic/pressure driven flow in the grooved
micro-channel. The controlled flow pattern enables entrapment and release of prescribed
amounts of scalar species in the grooves. As another application, hydrodynamic/
electrokinetic focusing in a micro-channel is studied. External electric field,
flow rate of pressure driven flow, and geometry in the micro-channel are manipulated
to obtain the focusing point, which led to determination of the electrophoretic mobility
and (relative) concentration of dilute mixtures. This technique can be used to
identify and detect species in dilute mixtures.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/2594 |
| Date | 01 November 2005 |
| Creators | Hahm, Jungyoon |
| Contributors | Beskok, Ali |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 7210252 bytes, electronic, application/pdf, born digital |
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