Combining a corrugated channel with nanofluids technologies can improve thermal performance and it can lead to more compact heat exchangers. A numerical study of thermal performance and heat transfer due to the turbulent flow of nanofluids through different configurations of trapezoidal corrugated channels has been investigated. Finite Volume Method (FVM) has been used for the discretization of the governing equations and computations have been performed under constant heat flux over a Reynolds numbers of 10,000-30,000. In order to investigate the impact of nanoparticles on heat transfer and fluid flow, four types of nanoparticles (Al2O3, CuO, SiO2 and ZnO) with varying volume fractions and particle diameter have been utilized in this study. It has been carried out for 0-8% nanoparticle volume fractions with 20-80nm particle diameters. Simulation results show that the corrugation profile has a significant impact on thermal performance compared to a straight profile. Furthermore, by adopting new channel geometries, heat transfer enhancement can be improved to approximately 2.3-3.7 times that of straight channels. Also, the values of Nu have been increased with the increase of Re and nanoparticle volume fraction, and with the decline of the particle diameter. For all the studied forms, the nozzle rib configuration of the trapezoidal corrugated channel achieved a maximum PEC of 2.95 at a volume fraction 0.08 and Re=10000.
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Ajeel et al. (2018) studied this question.