Effect on natural convection heat transfer of nanofluid in an enclosure due to uncertainties of viscosity and thermal conductivity

C. J. Ho, M. W. Chen, Z. W. Li

研究成果: Conference contribution

21 引文 斯高帕斯(Scopus)

摘要

In this study we aim to identify effects due to uncertainties in effective dynamic viscosity and thermal conductivity of nanofluid on laminar natural convection heat transfer in a square enclosure. Numerical simulations have been undertaken incorporating a homogeneous solid-liquid mixture formulation for the two-dimensional buoyancy-driven convection in the enclosure filled with alumina-water nanofluid. Two different formulas from the literature are each considered for the effective viscosity and thermal conductivity of the nanofluid. Simulations have been carried out for the pertinent parameters in the following ranges: the Rayleigh number, Raf = 103- 10 6 and the volumetric fraction of alumina nanoparticles, Φ = 0 4%. Significant difference in the effective dynamic viscosity enhancement of the nanofluid calculated from the two adopted formulas, other than that in the thermal conductivity enhancement, was found to play as a major factor, thereby leading to contradictory results concerning the heat transfer efficacy of using nanofluid in the enclosure.

原文English
主出版物標題2007 Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference - HT 2007
頁面833-841
頁數9
DOIs
出版狀態Published - 2007 十二月 1
事件2007 ASME/JSME Thermal Engineering Summer Heat Transfer Conference, HT 2007 - Vancouver, BC, Canada
持續時間: 2007 七月 82007 七月 12

出版系列

名字2007 Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference - HT 2007
1

Other

Other2007 ASME/JSME Thermal Engineering Summer Heat Transfer Conference, HT 2007
國家/地區Canada
城市Vancouver, BC
期間07-07-0807-07-12

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程
  • 機械工業
  • 凝聚態物理學

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