Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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The Effect of Suspension Stability on the Thermal Conductivity Enhancement of Water-based Au Nanofluids

물-기반 금나노유체의 분산안정성이 열전도도에 미치는 영향

  • 최태종 (한국항공대학교 항공 우주 및 기계공학부) ;
  • 김현진 (국방기술품질원) ;
  • 이승현 (한국항공대학교 항공 우주 및 기계공학부) ;
  • 박용준 (국방기술품질원) ;
  • 장석필 (한국항공대학교 항공 우주 및 기계공학부)
  • Received : 2016.06.07
  • Accepted : 2016.06.17
  • Published : 2016.06.30
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Abstract

This paper experimentally reports the effect of suspension stability on the thermal conductivity of water-based Au nanofluids. For this purpose, the water-based Au nanofluids are prepared by the one-step method called electro-chemical method with volume fraction of 0.0005%. The thermal conductivity of water-based Au nanofluids is measured from $22^{\circ}C$ to $42^{\circ}C$ using the transient hot wire method. To quantify the suspension stability of Au nanofluids, the suspension stability of nanofluids is evaluated using the in-house developed laser scattering system at a fixed wavelength of 632.8nm with the elapsed time. Based on the experimental results, the both thermal conductivity and suspension stability of water-based Au nanofluids are gradually decreased according to the time. These results experimentally show that the suspension stability of water-based Au nanofluids is the one of the important factor of thermal conductivity.

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References

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