Concentration polarization effects on the macromolecular transport in the presence of non-uniform magnetic field: A numerical study using a lumen-wall model

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• 作者：M. Mohammadpourfard ; H. Aminfar ; K. Khajeh
• 关键词：Macromolecular transport ; Non-uniform magnetic field ; Wall shear stress (WSS) ; Lumen-wall model ; LDL surface concentration (LSC)
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：April, 2014
• 年：2014
• 卷：356
• 期：Complete
• 页码：111-119
• 全文大小：4247 K

文摘

In this paper, the concentration polarization phenomena in a two dimensional tube under steady state conditions containing ferrofluid (blood and 4 vol% Fe₃O₄) is reported in the presence of non-uniform magnetic field. Lumen-wall model has been used for solving the mass transport equation. Hemodynamics parameters such as flow rate, viscosity, wall shear stress (WSS) and the macromolecules surface concentration which accumulate on the blood vessel wall, influenced the formation and progression of atherosclerosis disease. Effective parameters on the low density lipoprotein (LDL) surface concentration (LSC) such as: the wall filtration velocity, inlet Reynolds number and WSS under applied non-uniform magnetic field have been examined.

Numerical solution of governing equations of the flow field have been obtained by using the single-phase model and the control volume technique. Magnetic field is generated by an electric current going through a thin and straight wire oriented perpendicular to the tube. Results show WSS in the vicinity of magnetic field source increased and LSC decreased along the wall.