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Numerical study of nanofluids condensation heat transfer in a square microchannel

Abstract : This paper presents a numerical study of nanofluids condensation heat transfer inside a single horizontal smooth square tube. The numerical results are compared with the previous experimental predictions. The numerical results show that the heat transfer coefficient could be improved within 20% by increasing the volume fraction of Cu nanoparticle by 5% or by increasing the mass flux from 80 to 110 kg/m2 s. Reducing the hydraulic diameter of the microchannel from 200 to 160 µm leads to an increase in the condensation average heat transfer coefficient by 10%. A new correlation estimating the Nusselt number for the condensation of nanofluids or pure vapor is proposed. It predicts average condensation heat transfer with a good agreement with those computed.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02163851
Contributor : Christine Rouil <>
Submitted on : Monday, June 24, 2019 - 4:14:28 PM
Last modification on : Wednesday, October 14, 2020 - 3:59:29 AM

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H. El Mghari, H. Louahlia-Gualous, E. Lepinasse. Numerical study of nanofluids condensation heat transfer in a square microchannel. Numerical Heat Transfer, Part A Applications, Taylor & Francis, 2016, 69 (9), pp.957-976. ⟨10.1080/10407782.2015.1109339⟩. ⟨hal-02163851⟩

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