Numerical Analysis of Melting Process of Compounds Containing Nanoparticles for the Development of Phase Change Process

محورهای موضوعی : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک

نادر پورمحمود ¹ (دانشیار، دانشکده مکانیک، دانشگاه ارومیه)
ناصر مصطفوی نیا ² (دانشجوی دکتری، دانشکده مکانیک، دانشگاه ارومیه)
امیر حسن زاده ³ (دانشجوی دکتری، دانشکده مکانیک، دانشگاه ارومیه)

تاریخ دریافت : 1394/08/13 تاریخ پذیرش : 1394/08/13 تاریخ انتشار : 1393/10/01

کلید واژه: nanoparticles, Paraffin, Melting rate,

چکیده مقاله :

In this work, the melting process of compounds containing nanoparticles of NePCM in a square hole with different angles affected by two pairs of well-spring heat source on horizontal walls was numerically investigated. Four different configurations of elements were employed to investigate the effect of changes in the position of elements on the horizontal walls of the well-spring landscape on the ratio of liquid fraction. In the first case, the springs and wells have been located on horizontal walls separately. The environmental condition in the second case is that the spring-well elements have been set on the horizontal walls alternatively. In the third case, springs are on the left of well elements, and ultimately in the fourth case, spring and well elements are all set at the bottom of horizontal walls. Results show that in the first arrangement, using 2%weight of Al2O3 nanoparticles, compared to other cases, the highest ratio of liquid fraction is obtained.

چکیده انگلیسی:

در کار ارائه شده، فرآیند ذوب ترکیبات حاوی نانو ذرات (NePCM) در یک حفرهمربعی تحت زوایای مختلف در اثر اعمال دو جفت منبع حرارتی چاه-چشمه بر روی دیواره های افقی، بصورت عددی مورد بررسی قرار گرفته است. برای بررسی اثر تغییر در موقعیت المان­های چاه-چشمه روی دیوارهای افقی بر نسبت کسری مابع، چهار چیدمان مختلف از المانهای مذکور بکار گرفته شده است. در مورد اول، چشمه ها و چاه ها به طور جداگانه روی دیوارهای افقی قرارگرفته اند. شرایط محیطی در مورد دوم بدین صورت است که المان­های چشمه و چاه، بطور متناوب روی دیوارهای افقی چیده شده­ اند.در چیدمان سوم، چشمه­ها در سمت چپ المان­های چاه قرار گرفته و نهایتا در مورد شکل چهارم ، عناصر چشمه و چاه همه در پایین دیوار­های افقی قرار می گیرند. نتایج نشان می­دهد که در چیدمان اول با استفاده از 2 درصد وزنی نانو ذرات  Al2O3، در مقایسه با بقیه موارد، بیشترین نسبت کسری مایع بدست می­آید.

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