mirage

Instability of two pressure driven viscous fluid streams in a microchannel under a normal electric field

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

Instability of two pressure driven viscous fluid streams in a microchannel under a normal electric field

Show simple item record

dc.contributor.author Li, Haiwang
dc.contributor.author Wong, Teck Neng
dc.contributor.author Nguyen, Nam-Trung
dc.date.accessioned 2012-10-08T07:45:17Z
dc.date.available 2012-10-08T07:45:17Z
dc.date.copyright 2012
dc.date.issued 2012-10-08
dc.identifier.citation Li, H. W., Wong, T. N., & Nguyen, N.T. (2012). Instability of two pressure driven viscous fluid streams in a microchannel under a normal electric field. International Journal of Heat and Mass Transfer, 55(23-24), 6994–7004.
dc.identifier.uri http://hdl.handle.net/10220/8723
dc.description.abstract This paper investigates analytically and experimentally electrohydrodynamic instability of the interface between two viscous fluids with different electrical properties under constant flow rates in a microchannel. In the three-dimensional analytical model, the two-layer system is subjected to an electric field normal to the interface between the two fluids. There is no assumption on the magnitude of the ratio of fluid to electric time scales, and thus the linear Poisson–Boltzmann equation are solved using separation of variable method for densities of bulk charge and surface charge. The electric field and fluid dynamics are coupled only at the interface through the tangential and normal interfacial stress balance equations. In the experiments, two immiscible fluids, aqueous NaHCO3 (the high electrical mobility fluid) and silicone oil (polydimethylsiloxane, the low electrical mobility fluid) are pumped into a microchannel made in polymethyl methacrylate) (PMMA) substrate. The normal electric field is added using a high voltage power supply. The results showed that the external electric field and increasing width of microchannel destabilize the interface between the immiscible fluids. At the same time, the viscosity of the high electrical mobility fluid and flow rates of fluids has a stabilizing effect. The experimental results and the analytical results show a reasonable agreement.
dc.language.iso en
dc.relation.ispartofseries International journal of heat and mass transfer
dc.rights © 2012 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication International journal of heat and mass transfer. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.012.
dc.subject DRNTU::Engineering::Mechanical engineering.
dc.title Instability of two pressure driven viscous fluid streams in a microchannel under a normal electric field
dc.type Journal Article
dc.contributor.school School of Mechanical and Aerospace Engineering
dc.identifier.doi http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.012
dc.description.version Accepted version
dc.identifier.rims 167507

Files in this item

Files Size Format View
200. revised paper.pdf 2.672Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record

Statistics

Total views

All Items Views
Instability of two pressure driven viscous fluid streams in a microchannel under a normal electric field 268

Total downloads

All Bitstreams Views
200. revised paper.pdf 145
revised paper.docx 20

Top country downloads

Country Code Views
United States of America 79
Singapore 29
China 15
Turkey 8
Iran 6

Top city downloads

city Views
Mountain View 62
Singapore 29
Beijing 13
Istanbul 8
Sabz 6