Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Numerical study of non-uniform axial magnetic field effect on bubble growth in a boiling flow of nano ferro fluid in a microchannel

Authors
Mousa Mohammadpour fard 1
Mehdi Ghorbani Firouzsalari 2
1 Associate professor, Department of Mechanical Engineering, Shahid Mdani University of Azarbaijan
2 Msc., Department of Mechanical Engineering, Shahid Madani University of Azarbaijan
Abstract
In this research, growth of a vapor bubble in the nucleate boiling process in pure water and ferrofluids (water and 4 vol.% Fe3O4) was investigated numerically using VOF model and control volume technique. After verifying the results, effects of applying non-uniform axial magnetic fields on growth of the bubble in the boiling of magnetic nanofluids was investigated. Two positive and negative magnetic field gradients have been examined. Based on the obtained results, in the presence of magnetic field with a positive gradient pumping of heat from the side walls is increased and consequently it leads to reduce growth of the bubble unlike the magnetic field with negative gradient. It is concluded that using magnetic fields with positive gradients can increase the cooling efficiency of the micro-systems.
Keywords
Nanofluid boiling
Nonuniform magnetic field
Microchannel

Subjects

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Iranian Journal of Mechanical Engineering Transactions of ISME
Volume 17, Issue 4 - Serial Number 41
Heat Transfer and Fluid Mechanics
Winter 2016
Pages 46-68

  • Receive Date 19 January 2015
  • Revise Date 12 June 2015
  • Accept Date 13 July 2015