Abstract
In this paper, we present a numerical study of laminar mixed convection of a nanofluid in a pipe and compare the results to experimental measurements. Mechanisms that control the behavior of nanoparticles in the base fluid and the fluid motion are not very well known. Thus, it is important to know, which mathematical model describes the nanofluid best. For this study, we used two numerical models, that are based on the Euler–Euler modelling of multiphase flow. The comparison of results has shown that none of the numerical models could accurately model the flow of a nanofluid. Hence, to better model the nanofluid flow, we varied the nanoparticle concentration distribution at the inlet. The results show that the temperature field in the fluid and in the pipe depends strongly on the nanoarticle concentration distribution.
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