Investigation of the effect of magnetic field on ferrofluid in microelectromechanical devices (MEMS)

Ann Lee; Guan H. Yeoh; Shen H. Lim; B. Gangadhara Prusty

doi:10.1117/12.2028607

9 August 2013 Investigation of the effect of magnetic field on ferrofluid in microelectromechanical devices (MEMS)

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

Proceedings Volume 8793, Fourth International Conference on Smart Materials and Nanotechnology in Engineering; 879316 (2013) https://doi.org/10.1117/12.2028607
Event: Fourth International Conference on Smart Materials and Nanotechnology in Engineering, 2013, Gold Coast, Australia

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.

Citation Download Citation

Ann Lee, Guan H. Yeoh, Shen H. Lim, and B. Gangadhara Prusty "Investigation of the effect of magnetic field on ferrofluid in microelectromechanical devices (MEMS)", Proc. SPIE 8793, Fourth International Conference on Smart Materials and Nanotechnology in Engineering, 879316 (9 August 2013); https://doi.org/10.1117/12.2028607

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