Measurement of the thermal conductivity of nanofluids by the multicurrent hot-wire method



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Vázquez Peñas, José R. and Ortiz de Zárate Leira, José María and Khayet Souhaimi, Mohamed (2008) Measurement of the thermal conductivity of nanofluids by the multicurrent hot-wire method. Journal of Applied Physics, 104 (4). ISSN 0021-8979

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We present experimental results of the thermal conductivity of several nanofluids prepared by dispersing nanoparticles of SiO(2) and CuO in water and ethylene glycol at various concentrations up to approximate to 5% in mass fraction. The measurements have been performed by the multicurrent hot-wire technique. Good agreement, within 2%, is found in recommended and published thermal conductivities of the pure fluids. Our experimental technique allows a very accurate determination of the enhancement in the thermal conductivity of the fluids due to the presence of dispersed nanoparticles. Measured enhancements compare well with some of the values published so far in the literature. We have compared our results with simple theoretical models that predict the thermal conductivity of solid suspensions and found that in some cases observed enhancements are several times larger than the predicted ones.

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© 2008 American Institute of Physics. We have greatly appreciated stimulating discussions with Manuel M. Piñeiro from the University of Vigo (Spain). We are also indebted to the Spanish Ministerio de Educación y Ciencia (Contract No. FIS2006-05323) for supporting this research.

Uncontrolled Keywords:Ethylene-glycol; Heat-transfer; Absolute measurements; Enhancement; Mixtures; Nanoparticles; Viscosity; Water
Subjects:Sciences > Physics > Thermodynamics
ID Code:26461
Deposited On:27 Aug 2014 09:25
Last Modified:26 Feb 2015 12:27

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