Full Content is available to subscribers

Subscribe/Learn More  >

Transient Joule Heating and Its Effects on Electroosmotic Flow in a Microcapillary Packed Wth Microspheres

[+] Author Affiliations
Yuejun Kang, Chun Yang, Xiaoyang Huang

Nanyang Technological University, Singapore

Paper No. ICMM2005-75102, pp. 433-440; 8 pages
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME


The Joule heating induced temperature development and its effects on the electroosmotic flow in a capillary packed with microspheres is analyzed in this paper using finite-difference based numerical method. The model incorporates the coupled momentum equation for the electroosmotic velocity, the energy equations for temperature distributions, and the mass and electric current continuity equations. The temperature-dependent physical properties of the electrolyte solution are taken into consideration. The simulation predicts that, in the presence of Joule heating, there exists a significant axial temperature gradient in the thermal entrance region. This high temperature gradient strongly enhances the local electric field at the entrance, resulting in a non-uniform distribution along the flow direction. The temperature shows a parabolic radial profile but the gradient is very small due to the small system Biot number. The non-uniform temperature distribution in turn greatly affects the EOF velocity by means of changing the local viscosity and the dielectric constant of the fluid phase, and the local electric field strength. The results by this model are found to be in a good agreement with published analytical and experimental works in the literature.

Copyright © 2005 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In