شبیه‌سازی انتقال حرارت جابه‌جایی اجباری نانوسیال غیرنیوتنی محلول آبی کربوکسی متیل سلولز-اکسید آلومینیوم در یک میکرولوله در رژیم لغزشی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد نجف آباد

2 دانشگاه آزاد خمینی شهر

چکیده

در تحقیق حاضر جریان و انتقال حرارت نانوسیال غیرنیوتنی محلول آبی کربوکسی متیل سلولز- اکسید آلومینیوم با کسرحجمی های مختلف نانوذرات در یک میکرولولۀ دوبعدی شبیه‌سازی می شود. شرایط مرزی سرعت لغزشی و پرش دمایی روی دیوارۀ میکرولوله نیز درنظر گرفته می شود. اعتبار داده‌های حاصل در مقایسه با داده های محققان پیشین مورد ارزیابی قرار می‌گیرد. نتایج حاصل به‌صورت خطوط هم‌دما، عدد ناسلت، پروفیل های دما و سرعت در مقاطع مختلف میکرولوله ارائه می گردد. مشاهده می شود که عدد ناسلت با افزایش ضریب لغزش و درصد حجمی نانو ذرات جامد افزایش می‌یابد و نرخ این افزایش در مقادیر بالای عدد رینولدز بیشتر است.

کلیدواژه‌ها

عنوان مقاله [English]

Simulation of the Forced Convection Heat Transfer Non-Newtonian Nanofluid, Aqueous Solution of Carboxymethyl Cellulose-Aluminum Oxide, in Slip Flow Regime Through a Microtube

نویسندگان [English]

  • seyed ali sajadifar 1
  • arash karimipour 1
  • davood toghraei 2
1 najafabad
2 khomeinishahr
چکیده [English]

At present study the flow and heat transfer of Non-Newtonian nanofluid, aqueous solution of carboxymethyl cellulose-Aluminum oxide with different volume fractions of nano particles in a two dimensional microtube is simulated for the first time. Slip velocity and temperature jump boundary conditions are also considered along the microtube walls. The achieved results accuracy is investigated by comparison with those of previous data. The results are presented as isothermal contours, Nusselt number and the profiles of temperature and velocity at different cross sections of the microtube. It is observed that Nusselt number increases with slip velocity coefficient and volume fraction of nano particles; while its rate is more sensitive at higher values of Reynolds number.

کلیدواژه‌ها [English]

  • Non-Newtonian nanofluid
  • Micro tube
  • Slip velocity
  • Temperature jump

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