Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Influence of the electric double layer on induced pressure fields and development lengths in electro-osmotic flows

Zhang, Yonghao and Gu, X.J. and Barber, Robert W. and Emerson, David (2005) Influence of the electric double layer on induced pressure fields and development lengths in electro-osmotic flows. Modern Physics Letters B, 19 (28-29). pp. 1655-1658. ISSN 0217-9849

[img]
Preview
PDF (strathprints006977.pdf)
strathprints006977.pdf

Download (548kB) | Preview

Abstract

Electro-osmotic flow can be used as an efficient pumping mechanism in microfluidic devices. For this type of flow, frictional losses at the entrance and exit can induce an adverse longitudinal pressure distribution that can lead to dispersive effects. The present study describes a numerical investigation of the influence of the electric double layer on the induced pressure field and the flow development length. The induced pressure gradient is affected by the volumetric flow rate, fluid viscosity and the channel height. When the electric double layer is small, the development length remains constant at 0.57 of the channel height but decreases as the double layer grows in thickness.

Item type: Article
ID code: 6977
Keywords: engineering, microfluidics, electro-osmotic flow, induced pressure, entrance effects, Mechanical engineering and machinery, Physics
Subjects: Technology > Mechanical engineering and machinery
Science > Physics
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Strathprints Administrator
Date Deposited: 18 Sep 2008
Last modified: 15 Apr 2015 08:49
URI: http://strathprints.strath.ac.uk/id/eprint/6977

Actions (login required)

View Item View Item