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Simulation of concentration polarization at a microchannel-nanochannel interface
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Berardi, David A.. Simulation of concentration polarization at a microchannel-nanochannel interface. Retrieved from https://doi.org/doi:10.7282/T3F47MRG

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TitleSimulation of concentration polarization at a microchannel-nanochannel interface
NameBerardi, David A. (author); Diez, Francisco Javier (chair); Shan, Jerry (internal member); Zadeh, Shahab (internal member); Rutgers University; Graduate School - New Brunswick
Date Created2013
Other Date2013-05 (degree)
SubjectMechanical and Aerospace Engineering, Electrokinetics
Extentx, 77 p. : ill.
DescriptionWhen an electric field is applied to a microchannel-nanochannel junction for a nanochannel with overlapping electric double layers (EDL), a microvortex instability is produced at the interface. By incorporating nanochannels within microfluidic systems, functional lab-on-a-chip devices have been created for sample preparation, separation, and detection. Understanding ion transport and hydrodynamics in these systems is critical to fluid manipulation. The present numerical study models steady-state electrokinetically-driven flow in a hybrid microchannel-nanochannel system containing a cylindrical nanochannel with overlapping double layers connected to reservoirs on either side. The transport of potassium and chlorine ions was simulated in this system for a range of applied voltages. Ion concentration and fluid flow were studied at the microchannel-nanochannel interface, using large reservoirs to capture the role of ion depletion and microvortices. Microvortex instability was observed near the channel inlet. The vortices were shown to grow with increasing voltage. It was found that at a critical voltage, the vortex separated into multiple vortices, coinciding with a large drop of ionic current in the channel.
NoteM.S.
NoteIncludes bibliographical references
NoteBy David A. Berardi
Genretheses, ETD graduate
Persistent URLhttps://doi.org/doi:10.7282/T3F47MRG
Languageeng
CollectionGraduate School - New Brunswick Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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