Modeling of mass transfer enhancement in a magnetofluidic micromixer

被引:29
作者
Kumar, Chandan [1 ]
Hejazian, Majid [2 ]
From, Christopher [1 ]
Saha, Suvash C. [3 ]
Sauret, Emilie [1 ]
Gu, Yuantong [1 ]
Nam-Trung Nguyen [4 ]
机构
[1] Queensland Univ Technol, Chem Phys & Mech Engn, Brisbane, Qld 4000, Australia
[2] La Trobe Univ, La Trobe Inst Mol Sci, Dept Chem & Phys, ARC Ctr Excellence Adv Mol Imaging, Bundoora, Vic 3086, Australia
[3] Univ Technol Sydney, Fac Engn & Informat Technol, Sch Mech & Mechatron Engn, Ultimo, NSW 2007, Australia
[4] Griffith Univ, Queensland Micro & Nanotechnol Ctr, Brisbane, Qld 4111, Australia
基金
澳大利亚研究理事会;
关键词
SUSPENSIONS; SIMULATION; PARTICLES; CHIP;
D O I
10.1063/1.5093498
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The use of magnetism for various microfluidic functions such as separation, mixing, and pumping has been attracting great interest from the research community as this concept is simple, effective, and of low cost. Magnetic control avoids common problems of active microfluidic manipulation such as heat, surface charge, and high ionic concentration. The majority of past works on micromagnetofluidic devices were experimental, and a comprehensive numerical model to simulate the fundamental transport phenomena in these devices is still lacking. The present study aims to develop a numerical model to simulate transport phenomena in microfluidic devices with ferrofluid and fluorescent dye induced by a nonuniform magnetic field. The numerical results were validated by experimental data from our previous work, indicating a significant increase in mass transfer. The model shows a reasonable agreement with experimental data for the concentration distribution of both magnetic and nonmagnetic species. Magnetoconvective secondary flow enhances the transport of nonmagnetic fluorescent dye. A subsequent parametric analysis investigated the effect of the magnetic field strength and nanoparticle size on the mass transfer process. Mass transport of the fluorescent dye is enhanced with increasing field strength and size of magnetic particles.
引用
收藏
页数:9
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