Modeling of Electrothermal Flow Mixing in Lab on Chip Microfluidic Devices

Wasnik, Vishaka B (2016) Modeling of Electrothermal Flow Mixing in Lab on Chip Microfluidic Devices. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

Electrokinetics involves the study of liquid or particle motion under the action of an electric field; it includes electroosmosis, electrophoresis, dielectrophoresis, and electrowetting, etc. AC Electrokinetics (ACEK) has attracted much research interest for microfluidic manipulation for the last few years. It shows great potential for functions such as micropumping, mixing and concentrating particles. Based upon the actuation pattern microfluidic - based mixing devices can be categorized in two types. They are passive mixing microfluidic device and active mixing microfluidic device. Passive mixers typically utilize geometrical advantages to enhance mixing and they do not require external forces but a long mixing path was required. Active mixers are generally more effective than passive mixers. They utilize external driving forces like acoustics vibrations, electric and magnetic instability, temperature gradient due to joule heating etc. Like AC electroosmosis (AC EO) phenomena, AC electrothermal (ACET) effect is a hydrodynamic phenomena and acts on a suspended particle only through fluid drag because of Joule Heating. The challenges with ETE devices are the deciding threshold voltage, used for clinical diagnostic t o protect the cell from damage, choosing conductivity of the fluid, Electrode patterning and the switching of the electrode.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Thesis (Masters)
Uncontrolled Keywords: Electrothermal flow mixing, ETF, COMSOL modeling
Subjects: Biomedical Engineering
Divisions: Department of Biomedical Engineering
Depositing User: Team Library
Date Deposited: 15 Sep 2016 06:37
Last Modified: 20 Jun 2017 11:32
URI: http://raiith.iith.ac.in/id/eprint/2757
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