Numerical investigation of the magnetic field effect on the heat transfer and fluid flow of ferrofluid inside helical tube

2019 ◽  
Vol 137 (5) ◽  
pp. 1591-1601 ◽  
Author(s):  
S. M. Mousavi ◽  
N. Jamshidi ◽  
A. A. Rabienataj-Darzi
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Investigation ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Helical Tube ◽  
The Magnetic Field

scholarly journals Numerical Investigation of the Effect of Magnetic Field on Natural Convection in a Curved-Shape Enclosure

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
M. Sheikholeslami ◽  
I. Hashim ◽  
Soheil Soleimani
Keyword(s):  
Magnetic Field ◽  
Natural Convection ◽  
Numerical Investigation ◽  
Field Effect ◽  
Hartmann Number ◽  
Control Volume ◽  
Magnetic Field Effect ◽  
Convection Heat Transfer ◽  
Numerical Investigations ◽  
The Magnetic Field

This investigation reports the magnetic field effect on natural convection heat transfer in a curved-shape enclosure. The numerical investigation is carried out using the control volume-based-finite element method (CVFEM). The numerical investigations are performed for various values of Hartmann number and Rayleigh number. The obtained results are depicted in terms of streamlines and isotherms which show the significant effects of Hartmann number on the fluid flow and temperature distribution inside the enclosure. Also, it was found that the Nusselt number decreases with an increase in the Hartmann number.

Experimental Investigation of Magnetic Field Effect on the Magnetic Nanofluid Oscillating Heat Pipe

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Nannan Zhao ◽  
Dianli Zhao ◽  
Hongbin Ma
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Heat Pipe ◽  
Field Effect ◽  
Heat Transfer Performance ◽  
Magnetic Field Effect ◽  
Magnetic Nanofluid ◽  
Oscillating Heat Pipe ◽  
Oscillating Motion ◽  
The Magnetic Field

The magnetic field effect on oscillating motion and heat transfer in an oscillating heat pipe (OHP) containing magnetic nanofluid was investigated experimentally. The nanofluid consisted of distilled water and dysprosium (III) oxide nanoparticles with an average size of 98 nm. A magnetic field was applied to the evaporating section of the OHP by using a permanent magnet. The heat pipes charged with magnetic nanofluids at mass ratios of 0.1%, 0.05%, and 0.01% were tested. In addition, the effects of orientation and input power ranging from 50 W to 250 W on the heat transport capability of the heat pipe were investigated. The experimental results demonstrate that the magnetic field can affect the oscillating motions and enhance the heat transfer performance of the magnetic nanofluid OHP. The magnetic nanoparticles in a magnetic field can reduce the startup power of oscillating motion and enhance the heat transfer performance.

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