Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 442, Issue -, Pages 319-328Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2017.06.131
Keywords
Magnetic nanoparticles; Electro-osmotic flow; Pulsatile flow; Hartmann number; Electrical double layer
Funding
- SERB, Department of Science and Technology, New Delhi, Government of India [EEQ/2016/000050]
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In this paper, we have examined the motion of magnetic-nanoparticles and the flow characteristics of biofluid in a micro-tube in the presence of externally applied magnetic field and electrokinetic effects. In the drug delivery system, the motion of the magnetic nanoparticles as carriers is important for therapeutic procedure in the treatment of tumor cells, infections and removing blood clots. The unidirectional electro-osmotic flow of biofluid is driven by the combined effects of pulsatile pressure gradient and electrokinetic force. The governing equation for unsteady electromagnetohydrodynamic flow subject to the no-slip boundary condition has been solved numerically by using Crank-Nicolson implicit finite difference scheme. We have analyzed the variation of axial velocity, velocity distribution of magnetic nanoparticles, volumetric flow rate and wall shear stress for various values of the non-dimensional parameters. The study reveals that blood flow velocity, carriers velocity and flow rate are strongly influenced by the electro-osmotic parameter as well as the Hartmann number. The particle mass parameter as well as the particle concentration parameter have efficient capturing effect on magnetic nanoparticles during blood flow through a micro-tube for drug delivery. (C) 2017 Elsevier B.V. All rights reserved.
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