Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/98175
Title: Rapid magnetofluidic mixing in a uniform magnetic field
Authors: Zhu, Gui-Ping
Nguyen, Nam-Trung
Issue Date: 2012
Source: Zhu, G. P., & Nguyen, N. T. (2012). Rapid magnetofluidic mixing in a uniform magnetic field. Lab on a Chip, 12(22), 4772-4780.
Series/Report no.: Lab on a chip
Abstract: This paper reports the investigation of mixing phenomena caused by the interaction between a uniform magnetic field and a magnetic fluid in a microfluidic chamber. The flow system consists of a water-based ferrofluid and a mixture of DI water and glycerol. Under a uniform magnetic field, the mismatch in magnetization of the fluids leads to instability at the interface and subsequent rapid mixing. The mismatch of magnetization is determined by concentration of magnetic nanoparticles. Full mixing at a relatively low magnetic flux density up to 10 mT can be achieved. The paper discusses the impact of key parameters such as magnetic flux density, flow rate ratio and viscosity ratio on the mixing efficiency. Two main mixing regimes are observed. In the improved diffusive mixing regime under low field strength, magnetic particles of the ferrofluid migrate into the diamagnetic fluid. In the bulk transport regime under high field strength, the fluid system is mixed rapidly by magnetically induced secondary flow in the chamber. The mixing concept potentially provides a wireless solution for a lab-on-a-chip system that is low-cost, robust, free of induced heat and independent of pH level or ion concentration.
URI: https://hdl.handle.net/10356/98175
http://hdl.handle.net/10220/17613
DOI: 10.1039/c2lc40818j
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

SCOPUSTM   
Citations

62
checked on Sep 4, 2020

WEB OF SCIENCETM
Citations

65
checked on Sep 21, 2020

Page view(s)

255
checked on Sep 24, 2020

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.