Numerical study of magnetic nanoparticles concentration in biofluid (blood) under influence of high gradient magnetic field

2011 ◽  
Vol 323 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Mohammad Reza Habibi ◽  
Majid Ghasemi
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Numerical Study ◽  
Gradient Magnetic Field ◽  
High Gradient ◽  
Nanoparticles Concentration

A NUMERICAL STUDY ON THE MAGNETIC FLUID FLOW IN A CHANNEL SURROUNDING A PERMANENT MAGNET UNDER TEMPERATURE FIELD

2007 ◽  
Vol 21 (19) ◽  
pp. 1271-1283 ◽  
Author(s):  
X. L. LI ◽  
K. L. YAO ◽  
Z. L. LIU
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Fluid ◽  
Numerical Study ◽  
Drug Carrier ◽  
Temperature Fields ◽  
Gradient Magnetic Field ◽  
Local Skin ◽  
High Gradient ◽  
Magnetic Source

It was investigated that the magnetic fluid which can be the carrier of magnetic particles or magnetic drug carrier particles (MDCP) flows surrounding a permanent magnet in a channel under the influence of high gradient magnetic field and the temperature difference between upper and lower boundaries of the channel. It is considered that the magnetization of the fluid varies linearly with temperature and magnetic field intensity. The numerical solution of above model is described by a coupled and nonlinear system of PDEs. Results indicate that the presence of magnetic and temperature fields appreciably influence the flow field; vortexes arise almost around the magnetic source and also appear near the upper left and lower right boundaries. The temperature, local skin friction coefficient and rate of heat transfer are all affected by the magnitude and position of the magnetic source, they fluctuate evidently near the high gradient magnetic field area.

An Inductive Debris Sensor Based on a High-Gradient Magnetic Field

2019 ◽  
Vol 19 (8) ◽  
pp. 2879-2886 ◽  
Author(s):  
Song Feng ◽  
Leilei Yang ◽  
Guang Qiu ◽  
Jiufei Luo ◽  
Rui Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Gradient Magnetic Field ◽  
High Gradient

scholarly journals An Inductive Debris Sensor for a Large-Diameter Lubricating Oil Circuit Based on a High-Gradient Magnetic Field

2019 ◽  
Vol 9 (8) ◽  
pp. 1546 ◽  
Author(s):  
Hong Xiao ◽  
Xinyu Wang ◽  
Hongcheng Li ◽  
Jiufei Luo ◽  
Song Feng
Keyword(s):  
Magnetic Field ◽  
Wear Debris ◽  
Flow Path ◽  
Constant Current ◽  
Lubricating Oil ◽  
Sensor Output ◽  
Gradient Magnetic Field ◽  
High Gradient ◽  
Machine Failure ◽  
Excitation Coil

Wear is one of the main factors of machine failure. If abnormal wear was not detected in time during the operation of a mechanical system, it probably leads to catastrophic consequences. The wear debris in the lubricating oil circuit contains much information about equipment wear. Consequently, debris detection is regarded as an effective way to detect mechanical faults. In this paper, an inductive debris sensor based on a high-gradient magnetic field is presented for high-throughput lubricating oil circuits. The excitation coil of the sensor is driven by a constant current to generate a high-gradient magnetic field, and the induction coil is wound around the flow path. When wear debris cuts the magnetic line through the flow path, a corresponding induced voltage is generated. The experimental results show that the sensor output signal is linear with the drive current and the wear debris velocity. In addition, the shortest distance between the particles that the sensor output signals can be completely separated is 25 mm. When the distance is smaller, the induced signals are superimposed.

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