Diffusion enhancement in a laminar flow liquid by near-surface transport of superparamagnetic bead rows

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• 作者：Dennis Holzinger ; Arno Ehresmann
• 关键词：Microfluid mixing ; Exchange bias ; CFD simulations ; DOWMAT ; Diffusion enhancement ; Particle transport
• 刊名：Microfluidics and Nanofluidics
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：19
• 期：2
• 页码：395-402
• 全文大小：929 KB
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• 作者单位：Dennis Holzinger (1)
  Arno Ehresmann (1)
  
  1. Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett-Str. 40, 34132, Kassel, Germany
  
• 刊物类别：Engineering
• 刊物主题：Engineering Fluid Dynamics
  Medical Microbiology
  Polymer Sciences
  Nanotechnology
  Mechanics, Fluids and Thermodynamics
  Engineering Thermodynamics and Transport Phenomena
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1613-4990

文摘

An accurate computational fluid dynamic simulation model is presented to quantitatively elaborate parameter trends for optimum active mixing in a microfluidic device due to the domain wall movement assisted transport of superparamagnetic bead rows above a magnetic microstripe-patterned exchange bias layer system using Comsol Multiphysics. The presented simulation model is capable to study the effect of the microfluidic device length scales, the diffusive properties of the diluted species to be mixed and the applied movement scheme of the SPB rows for active mixing. The results show a remarkable increase in the mixing velocity for larger molecules with small molecular diffusion coefficients. Hence, this mixing technique seems to be promising for the implementation in biosensing applications for lab-on-a-chip devices. Keywords Microfluid mixing Exchange bias CFD simulations DOWMAT Diffusion enhancement Particle transport