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مکانیک سازه ها و شاره ها، جلد ۲، شماره ۳، صفحات ۱-۷
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| عنوان فارسی |
An approximate model for slug flow heat transfer in channels of arbitrary cross section |
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| چکیده فارسی مقاله |
In this paper, a novel approximate solution to determine the Nusselt number for thermally developed, slug (low-prandtl), laminar, single phase flow in channels of arbitrary cross section is presented. Using the Saint-Venant principle in torsion of beams, it is shown that the thermally developed Nusselt number for low-prandtl flow is only a function of the geometrical parameters of the channel cross section, i.e., area, perimeter and non-dimensional polar moment of inertia. The new proposed model is compared with the existing numerical results for elliptic, rectangular, regular polygonal, flat plate, isosceles triangular, equilateral triangular and circular sector channels. The model predicts the Nusselt number for the above mentioned channels within the about 10% or better with the exception of the circular sector in very small aspect ratios. The new model is expected to be accurate for other singly connected channels and can be used to determine the fully developed turbulent Nusselt number for liquid metal flows. Finally, the proposed model is used to determine the slug flow Nusselt number for unavailable geometries in the literature such as rhombic, circular segment, annular sector channel as well as rectangular channel with semicircular ends. |
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| کلیدواژه‌های فارسی مقاله |
Nusselt number، Laminar، Slug، Arbitrary Cross Section، Approximate Model، |
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| عنوان انگلیسی |
An Approximate Model for Slug Flow Heat Transfer in Channels of Arbitrary Cross Section |
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| چکیده انگلیسی مقاله |
In this paper, a novel approximate solution to determine the Nusselt number for thermally developed, slug (low-prandtl), laminar, single phase flow in channels of arbitrary cross section is presented. Using the Saint-Venant principle in torsion of beams, it is shown that the thermally developed Nusselt number for low-prandtl flow is only a function of the geometrical parameters of the channel cross section, i.e., area, perimeter and non-dimensional polar moment of inertia. The new proposed model is compared with the existing numerical results for elliptic, rectangular, regular polygonal, flat plate, isosceles triangular, equilateral triangular and circular sector channels. The model predicts the Nusselt number for the above mentioned channels within the about 10% or better with the exception of the circular sector in very small aspect ratios. The new model is expected to be accurate for other singly connected channels and can be used to determine the fully developed turbulent Nusselt number for liquid metal flows. Finally, the proposed model is used to determine the slug flow Nusselt number for unavailable geometries in the literature such as rhombic, circular segment, annular sector channel as well as rectangular channel with semicircular ends. |
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| کلیدواژه‌های انگلیسی مقاله |
Nusselt number, Laminar, Slug, Arbitrary Cross Section, Approximate Model |
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| نویسندگان مقاله |
محمد کلته |
دانشگاه گیلان
سازمان اصلی تایید شده: دانشگاه گیلان (Guilan university)
عباس عباسی |
دانشگاه صنعتی امیرکبیر
سازمان اصلی تایید شده: دانشگاه صنعتی امیرکبیر (Amirkabir university of technology)
مجید بهرامی |
دانشگاه سایمون فریزر کانادا
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| نشانی اینترنتی |
http://jsfm.shahroodut.ac.ir/article_69_c8d0a7ec8becc0124411a7260c94801e.pdf |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/1271/article-1271-230554.pdf |
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| زبان مقاله منتشر شده |
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