Ghajari, N., toghraie, D., azimian, A. (2016). A model for enhanced heat transfer in an enclosure using Nano-aerosols. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(2), 309-326.
Navid Ghajari; davood toghraie; ahmad reza azimian. "A model for enhanced heat transfer in an enclosure using Nano-aerosols". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9, 2, 2016, 309-326.
Ghajari, N., toghraie, D., azimian, A. (2016). 'A model for enhanced heat transfer in an enclosure using Nano-aerosols', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(2), pp. 309-326.
Ghajari, N., toghraie, D., azimian, A. A model for enhanced heat transfer in an enclosure using Nano-aerosols. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2016; 9(2): 309-326.
A model for enhanced heat transfer in an enclosure using Nano-aerosols
1Graduate, School of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Esfahan, Iran.
2Assistant Professor, Faculty of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Esfahan, Iran.
3Professor, Faculty of Mechanical Engineering, Islamic Azad University of Khomeini Shahr, Esfahan, Iran
Abstract
In this study, the behavior of nanoparticles using a numerical model is discussed. For this study a model for the expansion in free convection heat transfer and mix in a rectangular container with dimensions of 1 × 4 cm using Nano-aerosols in the air is going when copper nanoparticles, use and by changing the temperature difference between hot and cold wall, we will examine its impact on the rate of heat transfer. The simulation involves two-dimensional flow simulation and relaxed state of constant flux in free convection on the two lateral sides and on the top face of constant temperature (cold plate) at 300 K was considered And at low temperature (heat plate) in three modes 350, 400 and 450 K were compared. Temperature distribution, velocity, surface heat flux and Nusselt number during the course of our review.Finally, enhanced heat transfer in the presence of copper nanoparticles and changes in the temperature difference between warm and cold wall was observed
مدلی برای بررسی انتقال حرارت در یک محفظه با استفاده از نانو آئروسل
Authors [Persian]
نوید قاجاری1; داود طغرایی2; احمدرضا عظیمیان3
1کارشناسی ارشد، دانشکده مکانیک، دانشگاه آزاد اسلامی خمینی شهر، اصفهان، ایران.
2استادیار، دانشکده مکانیک، دانشگاه آزاد اسلامی خمینی شهر ، اصفهان، ایران.
3استاد، دانشکده مکانیک، دانشگاه آزاد اسلامی خمینی شهر ، اصفهان، ایران.
Abstract [Persian]
در این پژوهش به بررسی رفتار نانوذرات با استفاده از یک مدل عددی پرداخته شده است. برای این مطالعه از مدل فازهای مجزا برای بررسی انتقال حرارت جابجایی آزاد و ترکیبی در یک محفظه مستطیلی شکل با ابعاد 1×4 سانتیمتر مربع با استفاده از نانوآئروسل هنگامی که نانوذرات مس در هوا در جریان است، استفاده شده است و با تغییر در اختلاف دما در دیواره گرم و سرد، تاثیر آن را بر میزان انتقال حرارت بررسی شده است. شبیه سازی فوق شامل شبیه سازی جریان دو بعدی و آرام است و حالت شار ثابت بر روی 2 وجه جانبی در جابجایی آزاد و دمای ثابت بر روی وجه بالایی(صفحه سرد) با دمای 300 کلوین در نظر گرفته شد و دما در وجه پایینی (صفحه گرم) در سه حالت 350، 400 و 450 کلوین مقایسه شد. توزیع دما، بردار سرعت، شار حرارت سطح و عدد ناسلت در طول مسیر بررسی شده است.
Keywords [Persian]
نانوذره، آئروسل، انتقال حرارت جابجایی، نانو سیال
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