Suppression of air bubble in microfluidic channel using electro-acoustic excitation

Vardhan, Harsh and Priydarshi, Manish Kumar and Mahapatra, Roy D and Hegde, Gopalkrishna M (2012) Suppression of air bubble in microfluidic channel using electro-acoustic excitation. In: International Conference on Smart Materials Structu res and Systems, January 04-07, 2012, Bangalore, India.

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Abstract

A simple method to study the air bubble dynamics and to burst the air bubbles formed on the electrode– electrolyte interface in a parallel gate electrode fluidic channel is demonstrated. Upon application of a voltage across the electrodes,volume of water contained between them begins to electrolyzing depending on the conductivity, as well as it boils due to heating effect. This results in bubble formation within. These bubbles grow in radius with higher potential difference applied across the electrodes. As an approach towards removing these bubbles, an alternating current is applied at low potential difference of a 5 volts and high frequency at few megahertz. The alternating electric field had a heating effect on the bubbles where the energy input due to current heats up water and bursts the bubble. The bubbles of size up to 480μm were burst at 2500 V/m using this approach.

Item Type:	Conference Paper
Publisher:	SPIE-International Society for Optical Engineering
Additional Information:	Copyright of this article belongs to
Keywords:	Water; Bubble; Suppression; Burst; Electrolysis; Microfluidics; Channel; Electro; Acoustics; AC; Lab on Chip
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	11 Mar 2014 05:12
Last Modified:	11 Mar 2014 05:12
URI:	http://eprints.iisc.ac.in/id/eprint/48579

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