بررسی عددی جریان سیال، انتقال حرارت و تولید آنتروپی نانوسیال در جابه‌جایی توام در محفظه‌ی "Γ" شکل

نوع مقاله: پژوهشی

نویسندگان

دانشگاه کاشان

چکیده

در مطالعه حاضر، جریان سیال، انتقال حرارت و تولید آنتروپی در جابه‌جایی توام نانوسیال آب – اتیلن گلیکول-اکسید آلومینیم با خواص متغیر در محفظه‌ی "Γ" شکل به‌صورت عددی بررسی شده است. برای تحلیل جابه‌جایی توام از یک برنامه کامپیوتری به زبان فرترن بر اساس روش حجم محدود و الگوریتم سیمپلر استفاده شده است. مطالعه برای کسر حجمی نانوذرات 0تا 04/0، عدد ریچاردسون 01/0، 1/0، 1، 10 و 100، عدد گراشف 104 و در دو حالت، یک‌بار ضلع بالایی متحرک (U-) و بار دیگر ضلع جانبی سمت چپ متحرک (V-) انجام شده است. در همه اعداد ریچاردسون و در هر دو حالت (-U) و (V-) عدد ناسلت متوسط با افزایش کسر حجمی افزایش می‌یابد هر چند با کاهش عدد ریچاردسون این افزایش محسوس‌تر است. همچنین در همه اعداد ریچاردسون و در هر دو حالت مورد بررسی، تغییرات آنتروپی کل و آنتروپی تولیدی ناشی از حرارت با افزایش کسر حجمی رفتاری مشابه عدد ناسلت دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Numerical Study of fluid flow and heat transfer of mixed convection and entropy generation in a L-shaped cavity filled with nanofluid

نویسندگان [English]

  • Ali Akbar Abbasian Arani
  • Alireza Aghaee
  • Alireza Aghaee
  • Zahra Ghahfarokhi
چکیده [English]

In this work, the fluid flow and heat transfer and entropy generation of mixed convection in "Γ" -shaped cavity filled with Al2O3-Water-EG have been studied. For this propose, we used from a FORTRAN program based on finite volume method (FVM) and SIMPER algorithm. This investigation have done for volume fraction from 0 to 0.04, Richardson number between 0.01 and 100, and Grashof number equal to 104 for two situation, moving top wall with velocity of U from right to left and moving left vertical wall equal to V from up to bottom. In all cases average Nusselt number increase with adding of nanoparticle or decreasing of Richardson number. This phenomenon is sensitive with reduction of Richardson number. In addition for all Richardson number and for two cases total entropy generation and entropy generation due to conduction increase with nanoparticle volume fraction.

کلیدواژه‌ها [English]

  • Nanofluid
  • Entropy Generation
  • L-shaped cavity
  • Mixed convection
  • Variable properties
  • Numerical Solution
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