Induction heating of thin metal plates in time-varying external magnetic field solved as nonlinear hard-coupled problem

AbstractA novel method is proposed whereby non-magnetic objects can be moved along a surface at the microscale and nanoscale. It uses a negative magnetophoretic force, explained in the caption for figure one, on the non-magnetic objects which results from stabilized 10nm diameter iron oxide particles (ferrofluid) being attracted to regions of field maxima around magnetic islands on a surface, which pushes the non-magnetic objects to regions of field minima. By varying an external magnetic field we can control where these minima are and thus control how objects will position themselves with static fields and by using rotating time varying fields we can control how they move across the surface. This method does not require the objects to be initially in contact with the surface, as they will be pulled down to the surface from solution. While this paper deals with beads, any arbitrarily shaped object should be manipuable using this method. Additionally, while we address non-magnetic objects in this work similar methods could easily manipulate objects that are magnetic.

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Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field

IEEE Transactions on Applied Superconductivity ◽

10.1109/77.920243 ◽

2001 ◽

Vol 11 (1) ◽

pp. 1988-1991 ◽

Cited By ~ 21

Author(s):

T. Ohyama ◽

H. Shimizu ◽

M. Tsuda ◽

A. Ishiyama

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Time Varying ◽

Trapped Field

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Microwave Transparency of Thin Metal Plates in Parallel Magnetic Field

Japanese Journal of Applied Physics ◽

10.7567/jjaps.26s3.661 ◽

1987 ◽

Vol 26 (S3-1) ◽

pp. 661

Author(s):

V. Cardenas ◽

M. A. Lur'e ◽

V. G. Peschansky ◽

K. Yiasemides

Keyword(s):

Magnetic Field ◽

Thin Metal ◽

Parallel Magnetic Field ◽

Metal Plates

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An electromagnetic signal propagation in a transient magnetized plasma with a time-varying external magnetic field

Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) ◽

10.1109/mmet.2000.888534 ◽

2002 ◽

Author(s):

A.G. Nerukh ◽

K.M. Yemelyanov

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Signal Propagation ◽

Magnetized Plasma ◽

Electromagnetic Signal ◽

Time Varying

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Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2002.1018527 ◽

2002 ◽

Vol 12 (1) ◽

pp. 820-823 ◽

Cited By ~ 9

Author(s):

H. Shimizu ◽

H. Ueda ◽

M. Tsuda ◽

A. Ishiyama

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Time Varying ◽

Trapped Field

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Positioning and aligning CNTs by external magnetic field to assist localised epoxy cure

Open Physics ◽

10.1515/phys-2016-0057 ◽

2016 ◽

Vol 14 (1) ◽

pp. 508-516 ◽

Cited By ~ 2

Author(s):

G. Ariu ◽

I. Hamerton ◽

D. Ivanov

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Induction Heating ◽

Cure Kinetics ◽

Proof Of Concept ◽

Suitable Candidate ◽

Network Geometry ◽

Multi Walled Carbon Nanotubes ◽

Resin Curing ◽

Walled Carbon Nanotubes

AbstractThis work focuses on the generation of conductive networks through the localised alignment of nano fillers, such as multi-walled carbon nanotubes (MWCNTs). The feasibility of alignment and positioning of functionalised MWCNTs by external DC magnetic fields was investigated. The aim of this manipulation is to enhance resin curing through AC induction heating due to hysteresis losses from the nanotubes. Experimental analyses focused on in-depth assessment of the nanotube functionalisation, processing and characterisation of magnetic, rheological and cure kinetics properties of the MWCNT solution. The study has shown that an external magnetic field has great potential for positioning and alignment of CNTs. The study demonstrated potential for creating well-ordered architectures with an unprecedented level of control of network geometry. Magnetic characterisation indicated cobalt-plated nanotubes to be the most suitable candidate for magnetic alignment due to their high magnetic sensitivity. Epoxy/metal-plated CNT nanocomposite systems were validated by thermal analysis as induction heating mediums. The curing process could therefore be optimised by the use of dielectric resins. This study offers a first step towards the proof of concept of this technique as a novel repair technology.

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