Publicou 4 edições por ano
ISSN Imprimir: 2169-2785
ISSN On-line: 2167-857X
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CURVED SURFACE AND THERMAL PERFORMANCE FACTOR EFFECT USING SIC-AL2O3 HYBRID NANOFLUID JET IMPINGEMENT
RESUMO
This paper discusses the SiC-Al2O3/H2O (hybrid nanofluid) jet impinged on three different profiles: concave, convex, and flat. Hybrid nanofluid contains two types of nanoparticles including the base fluid (pure water). The purpose of this article is to examine the curved effect on the nanofluid flow and heat transfer patterns. The simulation was performed on a two-dimensional turbulent flow using the k-ω shear stress transport model. The thermophysical properties of hybrid nanofluid are coded using user-defined functions (UDF) of Ansys Fluent. The selected hybrid nanofluid gained a higher merit number as compared with hybrid and mono nanofluids. The analysis focuses on the effect of the flow dynamics and the distribution of Nusselt numbers in the stagnation region. Nusselt number is varied due to the difference in curved surface area. For concave surface effect, the highest peak point of local Nusselt number distribution is lower than the convex surface. The volumetric concentration of nanofluids and the jet nozzle diameter have significant effect on flow behavior and improvement of heat transmission. Flow field and temperature effect are relatively less than jet-exit Reynolds number. The thermal performance factor of the curved surface for jet-impingement cooling is proposed in this article. This analysis showed that at h/ω = 3 and h/ω = 7, the efficiency of the jet-impingement cooling is improved.
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