بررسی انتقال حرارت در فوم‌های فلزی در حضور جابجایی اجباری و تشعشع حرارتی به روش اغتشاش هموتوپی

نویسندگان

1 دانشگاه سمنان

2 دانشگاه صنعتی بابل

چکیده

جریان اجباری در محیط متخلخل فلزی اشباع از سیال در حضور تشعشع حرارتی به کمک روش اغتشاش هموتوپی بررسی می‌شود. مدل دارسی-برینکمن برای جریان سیال در محیط متخلخل برای دیدن تاثیرات دیواره استفاده می‌شود. شار حرارتی ثابتی به دیواره کانال وارد و انتقال حرارت تشعشعی به کمک هدایت حرارتی متغیر با دما مدلسازی می‌شود. در مطالعه حاضر برای اولین بار مساله انتقال حرارت غیر خطی همبسته جابجایی-تشعشع به کمک یک روش نیمه تحلیلی حل می‌شود. تاثیرات پارامترهای تشعشعی λ) و Tr) و پارامتر شکل محیط متخلخل (s) روی عدد ناسلت و پروفیل دمای بدون بعد بررسی و نشان داده می‌شود که محیط متخلخل و تشعشع حرارتی باعث افزایش میزان انتقال حرارت خواهد شد. همچنین بر دقت روش اغتشاش هموتوپی و محدودیت‌های آن نیز بحث خواهد شد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of the forced convection heat transfer in the presence of radiation in metal foams using HPM

نویسندگان [English]

  • Maziar Dehghan 1
  • Yousef Rahmani 2
  • Seyfolah Saedodin 1
  • Mohammad Sadegh Valipour 1
  • Davood Domiri Ganji 2
چکیده [English]

Forced convection heat transfer in metal foams in the presence of radiation heat transfer is studied using the homotopy perturbation method (HPM). To see wall effects, Darcy-Brinkman model for the flow in porous media is used. A constant heat flux is imposed at the wall and the radiation heat transfer is modeled by a temperature-dependent conductivity. In the present study the case of conjugate convection and radiation heat transfer is analyzed by a semi-analytical approach for the first time. Effects of the radiation parameters (λ, Tr) and porous medium shape parameter (s) on the Nusselt number and dimensionless temperature profile are investigated. Moreover, a discussion on the accuracy and limitations of the HPM method will be presented.

کلیدواژه‌ها [English]

  • porous media
  • Homotopy perturbation method
  • non-Darcian model
  • radiation
  • metal foams

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