بررسی تولید انتروپی در یک جریان لغزشی هیدرودینامیک مغناطیسی نانوسیال بر روی یک صفحه نفوذپذیر گسترش‌یافته

نوع مقاله : پژوهشی

نویسندگان

دانشگاه همدان

چکیده

در این مقاله قانون دوم ترمودینامیک بر روی یک صفحه نفوذپذیر گسترش‌یافته در حضور میدان مغناطیسی عمودی یکنواخت در یک جریان لغزشی نانوسیال بررسی شده است به طوری که چهار نانوذره مس ، اکسید مس ، اکسید آلومینیوم و دی اکسید تیتانیوم و همچنین آب به عنوان سیال پایه در نظر گرفته شده‌اند. معادلات تولید انتروپی، برای اولین بار در این مسئله، به صورت تابعی از گرادیان‌های سرعت و دما استخراج گردید. منحنی‌ سرعت و همچنین توزیع دما و متوسط تولید انتروپی توسط روش تحلیلی آنالیز هموتوپی به دست آمده است. با مقایسه نتایج به دست آمده و نتایج دیگر پژوهشگران مشاهده می‌شود که هم‌خوانی خوبی بین نتایج مشاهده شده است. نتایج حاصل از این مقاله، نشان می‌دهند که با کاهش پارامترهای مغناطیسی، کسر حجمی نانوذره، پارامتر مکش، عدد رینولدز، عدد برینکمن عدد هارتمن و همچنین افزایش پارامتر سرعت لغزشی، انتروپی تولید شده کاهش خواهد یافت.

کلیدواژه‌ها


عنوان مقاله [English]

Entropy Generation Analysis for an MHD Slip Nano-Fluid Flow over a Stretching Permeable Surface

نویسندگان [English]

  • Seyed Sajad jafari
  • navid Freidoonimehr
چکیده [English]

The main propose of the present article is to study the second law of thermodynamics over a stretching permeable surface in the presence of the uniform vertical magnetic field in the slip nano-fluid regime. In this study, four types of nanoparticles i.e. Copper , Copper oxide , Aluminum oxide , and Titanium dioxide and also water as the base fluid are considered. Entropy generation equations, for the first time in this problem, are derived as a function of velocity and temperature gradients. Velocity profile as well as temperature distribution and averaged entropy generation are obtained using Homotopy Analysis Method (HAM). An excellent agreement exists between the present result and the other researchers’ result. The obtained result of present study presents that by decreasing magnetic parameter, nanoparticle volume fraction parameter, suction parameter, Reynolds number, Brinkman number, and Hartmann number as well as increasing the slip velocity parameter, the generated entropy reduces.

کلیدواژه‌ها [English]

  • Second law of thermodynamics
  • Slip flow
  • Magneto-hydrodynamics flow
  • Nano-fluid
  • Homotopy Analysis Method
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