ترکیب روش شبکه بولتزمن و تاگوچی جهت بهینه سازی اثر میدان مغناطیسی بر روی همرفت طبیعی نانوسیال در محفظه نیم دایره ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی واحد ساری

2 فردوسی مشهد

چکیده

در این مقاله اثر میدان مغناطیسی بر روی جریان همرفت طبیعی نانو سیال در یک محفظه نیم‌دایره‌ای با حضور منبع حرارتی شبیه سازی شده است. ابتدا انتقال حرارت همرفت طبیعی در یک محفظه ساده با یک دیوار گرم و یک دیوار سرد تحت تاثیر میدان مغناطیسی به کمک روش شبکه بولتزمن شبیه سازی شده و نتایج بدست آمده با داده های قبلی مقایسه شده است. در ادامه پارامتر های تاثیرگذار دیگری از قبیل هندسه منبع حرارتی، زاویه میدان مغناطیسی و درصد حجمی نانوسیال بر چگونگی نرخ انتقال حرارت مورد تجزیه و تحلیل قرار گرفته است. بدین منظور نتایجی از قبیل خطوط جریان و خطوط همدما ارائه شده است. در نهایت با استفاده از روش تاگوچی پارامترهای تاثیرگذار و سطوح آنها شناسایی و از بین تعداد حالات ممکن، حالت بهینه برای شبیه‌سازی تعیین شده‌است. سرانجام با استفاده از آنالیز آماری این روش شرایط بهینه پیش بینی و تایید شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Lattice Boltzmann Simulation and Taguchi Optimization of Magnetic Field Effects on Nanofluid Natural Convection in a Semicircular Enclosure

نویسندگان [English]

  • javad ali nejad 1
  • javad abolfazli esfehani 2
1 azad , sari
2 ferdosi mashhad
چکیده [English]

This paper discusses the application of Taguchi method in assessing maximum heat transfer rate for a natural convection with magneto hydrodynamic flow in a semicircle enclosure, embedded with a heat source. The simulations were planned based on Taguchi method with each trial performed under different magnetic field, heat source aspect ratio, and particle volume fraction of nanofluid. Thermal lattice Boltzmann methods was used to simulate flow and thermal fields. Signal-to-noise ratio analysis was carried out in order to determine the effects of process parameters and optimal factor settings. Finally, confirmation tests verified that Taguchi method achieved optimization of heat transfer rate with sufficient accuracy.

کلیدواژه‌ها [English]

  • Taguchi Optimiz ation Method
  • Lattice Boltzmann Method
  • Natural Convection
  • Magnetic Field
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