Experimental Investigation of Mixed Convection Heat Transfer in Vertical Tubes byNanofluid: Effects of Reynolds Number and Fluid Temperature

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 635

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شناسه ملی سند علمی:

JR_IJE-27-8_011

تاریخ نمایه سازی: 12 آبان 1393

چکیده مقاله:

An experimental investigation was carried out to study mixed convection heat transfer from Al2O3-water nanofluid inside a vertical, W-shaped, copper-tube with uniform wall temperature. The testscovered different ranges of some involved parameters including Reynolds number, temperature andparticles volume fraction. The results showed that the rate of heat transfer coefficient improved withReynolds number for average wall temperatures of 50 and 60ºC. Additionally, the heat transfercoefficient increased slightly with an increase of the Reynolds number. Interestingly, the pressure dropof nanofluid was very close to that of base fluid. Besides, a new correlation was proposed to calculatethe Nusselt number in W-shaped tubes

کلیدواژه ها:

NanofluidMixed ConvectionAlumina NanoparticlesHeat Transfer

نویسندگان

a Rostamzadeh

Department of Mechanical Engineering, Engineering School, Shiraz University, Shiraz, Iran

k Jafarpur

Department of Mechanical Engineering, Engineering School, Shiraz University, Shiraz, Iran

e Goshtasbirad

Department of Mechanical Engineering, Engineering School, Shiraz University, Shiraz, Iran

mm Doroodmand

Department of Chemistry, Faculty of Science, Shiraz University, Shiraz, Iran