Effects of magnetic-fluid flow on structural instability of a carbon nanotube conveying nanoflow under a longitudinal magnetic field

The experiments are conducted on the magnetic fluid flow induced by the multi-pole rotating magnetic field in a circular cylinder. The numbers of poles are two, four, six, eight and twelve. The applied electric current and frequency are 2∼6 A and 20∼60 Hz, respectively. The peak velocity of the flow increases with the increase in the strength and the phase velocity of the magnetic field. As the increase in the number of poles, the flow shifts to the outer periphery.

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MAGNETIC FLUID HYPERTHERMIA IN A CYLINDRICAL GEL CONTAINS WATER FLOW

Journal of Mechanics in Medicine and Biology ◽

10.1142/s0219519415500888 ◽

2015 ◽

Vol 15 (05) ◽

pp. 1550088 ◽

Cited By ~ 3

Author(s):

MORTEZA HEYDARI ◽

MEHRDAD JAVIDI ◽

MOHAMMAD MAHDI ATTAR ◽

ALIREZA KARIMI ◽

MAHDI NAVIDBAKHSH ◽

...

Keyword(s):

Magnetic Field ◽

Experimental Data ◽

Fluid Flow ◽

Magnetic Fluid ◽

Blood Perfusion ◽

Temperature Function ◽

Magnetic Fluid Hyperthermia ◽

Frequency Magnetic Field ◽

Complicated Part ◽

Cancerous Cells

In magnetic fluid hyperthermia (MFH), nanoparticles are injected into a diseased tissue and then subjected to an alternating high frequency magnetic field. The produced heat may have a key asset to destroy the cancerous cells. The blood flow in a tissue is considered as the most complicated part of the MFH which should be taken into account in the analysis of the MFH. This study was aimed to perform an experimental study to investigate the heat transfer of agar gel which contains fluid flow. Fe 3 O 4 as a nanoparticle was injected into the center of a cylindrical gel. It was also embedded with other cylindrical gels and subjected to an alternating magnetic field of 7.3 (kA/m) and a frequency of 50 (kHz) for 3600 (s). The temperature of the gel was measured at three points. The temperature distribution was measured via the experimental data. Moreover, specific absorption rate (SAR) was quantified with time differential temperature function at t = 0 by means of experimental data. Finite element method (FEM) was employed to establish a model to validate the SAR function. Results revealed the effects of fluid flow and accuracy of the SAR function for heat production in gel. The proposed function have implications in hyperthermia studies as a heat generation source. Finally, the condition of experimental setup was simulated to find the blood perfusion.

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Experimental Study on Flow Structure Change in Turbulent Magnetic Fluid Flow by Applying Magnetic Field

The Proceedings of the Fluids engineering conference ◽

10.1299/jsmefed.2016.1014 ◽

2016 ◽

Vol 2016 (0) ◽

pp. 1014

Author(s):

Takuma TSUKAMOTO ◽

Masaaki Motozawa ◽

Yasuo Kawaguchi ◽

Mitsuhiro Fukuta

Keyword(s):

Magnetic Field ◽

Experimental Study ◽

Fluid Flow ◽

Flow Structure ◽

Magnetic Fluid ◽

Structure Change

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Numerical Simulation of Magnetic Fluid Used in Sintering and Cooling Equipments Seals as a Functional Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.3096 ◽

2011 ◽

Vol 239-242 ◽

pp. 3096-3099

Author(s):

Ming Hua Bai ◽

Hong Liang Zhou

Keyword(s):

Magnetic Field ◽

Numerical Simulation ◽

Fluid Flow ◽

External Magnetic Field ◽

Magnetic Fluid ◽

Permanent Magnets ◽

Quiescent State ◽

Flow State ◽

Functional Material ◽

Volume Force

Magnetic fluid as a functional material can produce volume force under external magnetic field, for the purpose of controlling the magnetic fluid flow state in the non-magnetic sealing groove with external magnetic field, the volume force is written as a function form of AZ to do with the numerical simulation of magnetic fluid flow in the sealing groove. The result shows that the magnetic fluid which distributes at the right-angle edges of the two permanent magnets nearby the separator presents unsteady swirl flow due to the volume force, while the rest magnetic fluid is in the quiescent state. It means that the magnetic fluid seal method can effectively solve the air leakage of band sintering machine and circular cooling machine.

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