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The Impact of Nanoparticles on Forced Convection in a Serpentine Microchannel | ||
| Challenges in Nano and Micro Scale Science and Technology | ||
| مقاله 1، دوره 2، شماره 2، مهر 2014، صفحه 86-99 اصل مقاله (899.89 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.7508/tpnms.2014.02.001 | ||
| نویسندگان | ||
| P. Rahim Mashaei* ؛ S.M. Hosseinalipour؛ M. El Jawad Muslmani | ||
| Mechanical Engineering Department, Iran University of Science and Technology (IUST), Tehran, I.R. Iran | ||
| چکیده | ||
| In this study heat transfer and fluid flow characteristics of Al2O3/water nanofluid in a serpentine microchannel is numerically investigated. A constant heat flux is applied on microchannel wall and a single-phase model has been adopted using temperature-dependent properties. The effects of pertinent factors such as Reynolds number (Re=10, 20, 50 and 100), particle volume fraction (𝛷=0(distilled water), 2, 4 and 8%) and heat flux (q=5, 10 and 15 W/cm2), on the velocity and temperature field, average heat transfer coefficient (havg), pressure drop (Δp), and thermal-hydraulic performance (η) are evaluated. The results show that the use of nanofluid causes increased velocity gradient near the wall which is more remarkable for φ = 8%. The results also reveal that the heat transfer rate increases as nanoparticle volume fraction and Reynold number increase and a maximum value 51% in the average heat transfer coefficient is detected among all the considered cases when compared to basefluid (i.e., water). It is found that a higher heat flux leads to heat transfer enhancement and reduction in pressure drop. Finally, thermal-hydraulic performance is calculated and it is seen that the best performance occurs for Re =10 and φ = 4%. | ||
| کلیدواژهها | ||
| Al2O3/water؛ Viscosity؛ thermal conductivity؛ Nanofluid | ||
| مراجع | ||
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