Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Soret effect on the convective instability in binary nanofluids

Soret 효과를 고려한 이성분 나노유체에서의 대류 불안정성 해석

  • Kim Jake (School of Chemical Engineering, Seoul National University) ;
  • Jung Chung Woo (School of Mechanical and Industrial System Engineering, Kyung Hee University) ;
  • Kang Yong Tae (School of Mechanical and Industrial System Engineering, Kyung Hee University) ;
  • Choi Chang Kyun (School of Chemical Engineering, Seoul National University)
  • 김제익 (서울대학교 응용화학부) ;
  • 정청우 (경희대학교 기계산업시스템공학부) ;
  • 강용태 (경희대학교 기계산업시스템공학부) ;
  • 최창균 (서울대학교 응용화학부)
  • Published : 2005.03.01
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Abstract

The objective of the present study is to study the Soret effect of both nanoparticles and solute on the convective instabilities in binary nanofluids. A new stability criterion is obtained based on the linear stability theory. The results show that the Soret effect of solute(${\psi}_{bf}$) makes the binary nanofluids unstable significantly and the convective motion in a binary nanofluid sets in easily as the ratio of Soret coefficient of nanofluid to that of binary basefluid ${\delta}_4$ increases for ${\delta}_4$ > -1. It is also found that as an increase of the volume fraction of nanoparticles, nanofluid becomes stable but at a separation ratio of ${\psi}=-0.3$ the state of fluid changes from stable to unstable.

Keywords

References

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