Numerical Study of Nanofluid Condensation Heat Transfer in a Square Microchannel |
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Authors: | H El Mghari E Lepinasse |
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Affiliation: | Université de Caen Basse Normandie, LUSAC-site de Saint L?, Saint L?, France |
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Abstract: | This study presents a numerical study of nanofluid condensation heat transfer inside a single horizontal smooth square tube. The numerical results are compared to previous experimental predictions, and show that the heat transfer coefficient can be improved 20% by increasing the volume fraction of Cu nanoparticles by 5% or increasing the mass flux from 80 to 110 kg/m2 s. Reducing the hydraulic diameter of the microchannel from 200 to 160 µm led to an increase in average condensation heat transfer coefficient of 10%. A new correlation estimating Nusselt number for condensation of nanofluids or pure vapor is proposed. It predicts average condensation heat transfer, with good agreement with the computed values. |
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