انتقال حرارت مزدوج در یک محفظه بسته حاوی بلوک متخلخل

نوع مقاله : مقاله کوتاه

نویسندگان

1 دانشگاه صنعتی شاهرود

2 دانشگاه شاهرود

چکیده

در این مقاله به بررسی انتقال حرارت جابجایی آزاد مزدوج در داخل یک محفظه بسته حاوی بلوک متخلخل با چیدمان دلخواه موانع مربعی با ضریب هدایت حرارتی مشخص پرداخته می شود. انتقال حرارت جابجایی آزاد در محفظه با تغییرات عدد رایلی، تعداد موانع مربعی، تغییر چیدمان موانع و همچنین نسبت تخلخل بلوک متخلخل مورد مطالعه قرار گرفته و پارامترهای موثر بر انتقال حرارت بررسی می شوند. عدد ناسلت به عنوان معیار انتقال حرارت نیز روی دیواره‌های محفظه بدست آمده و اعتبارسنجی مناسب ارائه شده است. نتایج نشان می‌دهد که تغییر تعداد موانع داخل بلوک متخلخل، نسبت تخلخل و همچنین چیدمان آنها در داخل بلوک متخلخل اثر کمتری در مقایسه با تغییرات عدد رایلی در محفظه متخلخل دارند. با این وجود، با افزایش تعداد موانع هادی در داخل محفظه بسته، عدد ناسلت کاهش یافته است.

کلیدواژه‌ها


عنوان مقاله [English]

Conjugate Heat Transfer in Closed Cavity with Porous Blocks

نویسندگان [English]

  • Mohsen Nazari 1
  • H Gerivani 2
  • S. Tafakkor 2
1 University of Shahrood
2 Univ of Shahrood
چکیده [English]

In this paper, free convection heat transfer is completely analyzed in a closed cavity containing internal conducting blocks with arbitrary arrangement. Free convection heat transfer in the cavity is studied according to the variations of Rayleigh number, number of conducting blocks, arrangements of blocks and the porosity. The overall Nusselt number as a criterion of heat transfer is reported on the walls of the cavity. The obtained results show that the thermal effects of porosity and the arrangements of blocks in the cavity are less than the effects of Rayleigh number. However, increasing the number of blocks inside the cavity leads to a decrease in the overall Nusselt number.

کلیدواژه‌ها [English]

  • porosity
  • Conjugate heat transfer
  • Porous cavity
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