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Date of Publication:2022-10-06

Journal:化工学报

Affiliation of Author(s):能源与动力学院

Issue:10

Page Number:3057-3061

ISSN No.:0438-1157

Abstract:Heat transfer performance of nanofluid is superior to that of original pure fluid because the suspended nanoparticles remarkably increase the thermal conductivity of the mixture and improve its capability of energy exchange. The evaporation of nanofluid droplet will be widely applied in the field of vehicle, spaceflight, voyage, shipping and electron. The hydrokinetics, theories on heat and mass transfer and material science, and the behavior dynamics of free interface are involved in the evaporation process of nanofluid droplets. In this study, lattice Boltzmann method is applied to simulate the deformation of nanofluid droplet when it evaporates on a heated horizontal surface. A double distribution model is adopted, in which D2Q9 is used to calculate the velocity distribution while D2Q5 is used for calculation of temperature distribution. The results show that the nanofluid droplet experiences pinning and depinning stages. Because of the strong pinning action of nanoparticles, the ring sediment is specially investigated at the end of evaporation, which shows the characteristics of nanofluid as the result of strong pinning action with the Brownian motion and the interaction between the particles considered. The simulation results are in good agreements with the experimental results in literature.

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