Simulation of nanofluids laminar flow in a vertical channel

Kamel, Mohammed Saad and Lezsovits, Ferenc (2018) Simulation of nanofluids laminar flow in a vertical channel. Pollack Periodica, 13 (2). pp. 147-158. ISSN 1788-1994

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Abstract

In the present study, fully developed laminar flow with forced convection heat transfer of Al2O3 water and TiO2 water nanofluids inside a vertical tube subjected by constant heat flux from the wall was numerically analyzed using Ansys Fluent release 17.2. In this work, the single-phase model was proposed to simulate the water and nanofluids heat transfer characteristics; spherical nanoparticles with a constant diameter equal to 30 nm are used. The study has been carried out on a Reynolds number with ranges (400-2000) and nanoparticles volume concentration up to 1.5%. the results show that the average Nusselt number for nanofluid is higher than that the base fluid (water) especially for TiO2 water nanofluid, the Nusselt number increased with increasing Reynolds number and volume concentration in all cases. The enhancement ratio for nanofluids compared to water at different volume friction was studied; the higher improvement is about 3.51% for TiO2 water nanofluid with 1.5% volume fraction. Moreover, a study for pressure drop along vertical tube was discussed.

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