10 فروردین 1403
مسعود مفرحي

مسعود مفرحی

مرتبه علمی: استاد
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 07331222613
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان Numerical analysis of natural convection of alumina–water nanofluid in H-shaped enclosure with a V-shaped baffle
نوع پژوهش مقالات در نشریات
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مجله Journal of the Taiwan Institute of Chemical Engineers
شناسه DOI
پژوهشگران فاطمه کرامت (نفر اول) ، پیمانه دهقان (نفر دوم) ، مسعود مفرحی (نفر سوم) ، چانگ ها لی (نفر چهارم)

چکیده

Numerical analysis of the free convection heat transfer in an H-shaped cavity loaded with alumina–water nanofluid is performed in this work. The entire bottom wall of the H-shaped enclosure and the top rib are at the hot temperature, the two sidewalls are at the lower temperature, and the others are insulated. This study aims to elucidate the influences of different variables on the heat transfer of nanofluid, namely the Rayleigh number (Ra?=?104–106), nanoparticle volume fraction percentage (??=?0–2%), aspect ratio (AR?=?0.2–0.4), installation of baffle, location of baffle in the cavity, and the types of baffle boundary condition. To model the buoyancy force, the Boussinesq approximation is employed. The characteristics of flow and thermal transmission are presented in streamlines and isotherms. The results show that the heat transmission is improved by Rayleigh number enhancement and nanoparticle volume fraction due to the enhanced temperature gradient and the nanofluid thermal characteristics. In addition, the baffle installation at the bottom rib under a non-adiabatic boundary condition improve the heat transfer because the bottom wall has a larger mean temperature than the top wall.