01 مهر 1400
احمد آذري

احمد آذری

مرتبه علمی: دانشیار
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 07733441913
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان
مدلسازی CFD انتقال حرارت جابجایی طبیعی نانوسیالات اکسید فلزی در کویتی مربعی
نوع پژوهش مقالات در همایش ها
کلیدواژه‌ها
CFD, Nano-particles, Heat transfer, Nusselt number
پژوهشگران فاطمه استوار (نفر اول) ، احمد آذری (نفر دوم)

چکیده

In this work, the CFD modeling of laminar convective heat transfer of water-based metal oxide nanofluids in a square cavity were investigated. The continuity, momentum and energy equation governing the proper boundary conditions were solved with finite volume numerical method. Physical properties such as thermal conductivity and viscosity changes due to temperature were studied. The effects of different nanoparticles such as Al2O3, CuO, SiO2 and ZnO in the range of 20 to 60 nm were studied and the results were compared with experimental results. Thus dimensionless numbers of Grashof (Gr), Nusselt (Nu) and Rayleigh (Ra) for different volume fraction were investigated. The results show that, by increasing the concentration from 0.5 to 3 volume percent the heat transfer coefficient and Nusselt number increases mobility. Heat transfer enhancement of nanofluids showed an increase of about 20 percent. So the results showed that by increasing the diameter for a given volume fraction increased Nusselt number. In addition, the particles diameter can affect the viscosity of nanofluids. But according to the results, changing the diameter had little impact on the rate of heat transfer.