Investigation of the effect of magnetic field on ferrofluid in micro electro-mechanical devices (MEMS)

Ann Lee*, H. Yeoh Guan, H. Lim Shen, B. Gangadhara Prusty

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

Considerable efforts have been spent in the development of magnetic nanoparticles (MNPs) in the last decade to understand their behaviour, and the improvement of their applicability in many different areas. Precise control over the synthesis conditions and surface functionalization of MNPs is crucial because it governs their physical properties and their colloidal stability. The magnetic platforms possess very small size and narrow size distribution together with high magnetization values. These nanoparticles (NPs) must combine high magnetic susceptibility for an optimum magnetic enrichment and loss of magnetization after removal of the magnetic field. Computational Fluid Dynamics (CFD) approach has been used to investigate the impact of a magnetic field in ferrofluid flow through a T-microchannel. The microchannel consists of one 400μm wide main branch and two 200μm wide sidebranches. Available experimental data is used to validate the Eulerian-Eulerian approach in simulating the nanoparticles in flow flow under the influence of magnetic field. In general, magnetic nanoparticles are deflected across the suspending ferrofluid by negative magnetophoresis and confined by a water flow to the center of the micro-channel. The effect of ferrofluid flow rate on the particle focusing performance has been examined. It is found that the particle focusing effectiveness increases with decreasing flow rate.

Original languageEnglish
Title of host publicationFourth International Conference on Smart Materials and Nanotechnology in Engineering
EditorsJayantha A. Epaarachchi, Alan Kin-tak Lau, Jinsong Leng
Place of PublicationWashington, DC
PublisherSPIE
Pages1-10
Number of pages10
Volume8793
ISBN (Print)9780819496300
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event4th International Conference on Smart Materials and Nanotechnology in Engineering, SMN 2013 - Gold Coast, QLD, Australia
Duration: 10 Jul 201312 Jul 2013

Other

Other4th International Conference on Smart Materials and Nanotechnology in Engineering, SMN 2013
CountryAustralia
CityGold Coast, QLD
Period10/07/1312/07/13

Keywords

  • CFD
  • Magnetic field effect
  • Magnetorheological fluid
  • Particle focusing

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