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بررسی انتقال حرارت در فومهای فلزی در حضور جابجایی اجباری و تشعشع حرارتی به روش اغتشاش هموتوپی | ||
| مدل سازی در مهندسی | ||
| مقاله 1، دوره 14، شماره 46، مهر 1395، صفحه 1-9 اصل مقاله (862.04 K) | ||
| شناسه دیجیتال (DOI): 10.22075/jme.2017.1771 | ||
| نویسندگان | ||
| مازیار دهقان* 1؛ یوسف رحمانی2؛ سیف الله سعدالدین1؛ محمدصادق ولیپور1؛ داوود دومیری گنجی2 | ||
| 1دانشگاه سمنان | ||
| 2دانشگاه صنعتی بابل | ||
| تاریخ دریافت: 02 اردیبهشت 1393، تاریخ پذیرش: 05 آبان 1393 | ||
| 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 | ||
| : محیط متخلخل؛ اغتشاش هموتوپی؛ مدل غیر دارسی؛ تشعشع حرارتی؛ فومهای فلزی | ||
| عنوان مقاله [English] | ||
| Investigation of the forced convection heat transfer in the presence of radiation in metal foams using HPM | ||
| نویسندگان [English] | ||
| Maziar Dehghan1؛ Yousef Rahmani2؛ Seyfolah Saedodin1؛ Mohammad Sadegh Valipour1؛ Davood Domiri Ganji2 | ||
| 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 | ||
| مراجع | ||
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