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An active microfluidic mixer utilizing a hybrid gradient magnetic field

2015; IOS Press; Volume: 47; Issue: 3 Linguagem: Inglês

10.3233/jae-140057

1875-8800

Quanliang Cao, Xiaotao Han, Liang Li,

Innovative Microfluidic and Catalytic Techniques Innovation

A simple active microfluidic mixing system based on magnetic actuation strategy of fluids in the microchannel under a hybrid gradient magnetic field was proposed. The hybrid magnetic field, combined of a static gradient magnetic field and an external AC uniform magnetic field, is specia lly designed to generate periodic magnetic body forces acting on the mixed fluids. Two-dimensional numerical simulation has been performed to investigate the mixing behavior caused by the interactions of magnetic field, fluid flow and convection-diffusion. Numerical results show that the proposed mixer system achieved up to 97% mixing of the two fluids with a small current flowing in micromagnets.