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Transport Phenomena in Nano and Micro Scales، جلد ۱، شماره ۱، صفحات ۱-۱۸
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Natural Convection and Entropy Generation in Γ-Shaped Enclosure Using Lattice Boltzmann Method |
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| چکیده انگلیسی مقاله |
This work presents a numerical analysis of entropy generation in Γ-Shaped enclosure that was submitted to the natural convection process using a simple thermal lattice Boltzmann method (TLBM) with the Boussinesq approximation. A 2D thermal lattice Boltzmann method with 9 velocities, D2Q9, is used to solve the thermal flow problem. The simulations are performed at a constant Prandtl number (Pr = 0.71) and Rayleigh numbers ranging from 103 to 106 at the macroscopic scale (Kn = 10-4). In every case, an appropriate value of the characteristic velocity is chosen using a simple model based on the kinetic theory. By considering the obtained dimensionless velocity and temperature values, the distributions of entropy generation due to heat transfer and fluid friction are determined. It is found that for an enclosure with high value of Rayleigh number (i.e., Ra=105), the total entropy generation due to fluid friction and total Nu number increases with decreasing the aspect ratio. |
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| نویسندگان مقاله |
e فتاحی |
faculty of mechanical engineering, babol university of technology babol, iran
m فرهادی |
faculty of mechanical engineering, babol university of technology babol, iran
k صدیقی |
faculty of mechanical engineering, babol university of technology babol, iran
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| نشانی اینترنتی |
http://tpnms.usb.ac.ir/article_991_ed33fb88310481a59b7edd67542621f9.pdf |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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