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Heat transfer in MHD square duct flow of nanofluid with discrete heat sources | ||
| Challenges in Nano and Micro Scale Science and Technology | ||
| مقاله 2، دوره 6، شماره 2، مهر 2018، صفحه 88-95 اصل مقاله (582.19 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22111/tpnms.2018.20662.1120 | ||
| نویسندگان | ||
| Arjun Kozhikkatil Sunil* 1؛ Rakesh Kumar2 | ||
| 1Indian Institute of Technology (ISM) Dhanbad | ||
| 2Indian Institute of Technology (ISM) Dhanbad, India | ||
| چکیده | ||
| The effect of thermal and solutal buoyancy induced by a discrete source of heat and mass transfer in a square duct under the influence of magnetic field, especially at the turbulent regime for the first time is reported. Al2O3/water nanofluid is used with constant heat flux from three discrete heat sources. In the present study, the effects of Reynolds number (100 to 3000), particle volume fraction (0 to 2%) and magnetic field (Ha = 10 to 90) on the Nusselt number, pressure drop and wall temperature (at the axial and height directions) are represented graphically and discussed quantitatively. Two percent Al2O3-water nanofluid under Ha = 10 can produce 81% increase in Nusselt number with only 60% increase in pressure drop when compared to base fluid at Re = 100. Four percent enhancement in nanofluids cooling effect in the vicinity of a centre of the final heat source can be utilized in hot spots cooling. | ||
| کلیدواژهها | ||
| discrete heat source؛ heat transfer؛ Magneto Hydro Dynamics؛ Nusselt number؛ square duct | ||
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