A model on the basis of analytics for computing maximum heat transfer in porous fins

被引:77
作者
Kundu, Balaram [1 ,2 ]
Bhanja, Dipankar [1 ]
Lee, Kwan-Soo [2 ]
机构
[1] Jadavpur Univ, Dept Mech Engn, Kolkata 700032, India
[2] Hanyang Univ, Sch Mech Engn, Seoul 133791, South Korea
关键词
Darcy model; Straight fin; Natural convection; Performance; Porous surface; Optimization; PERFORMANCE ANALYSIS; WET FINS; OPTIMIZATION ANALYSIS; NATURAL-CONVECTION; ENVELOPE SHAPE; STRAIGHT TAPER; CIRCULAR FINS; ANNULAR FINS; SUBJECT; PROFILE;
D O I
10.1016/j.ijheatmasstransfer.2012.07.069
中图分类号
O414.1 [热力学];
学科分类号
摘要
This study presents an analytical work on the performance and optimum design analysis of porous fin of various profiles operating in convection environment. Straight fins of four different profiles, namely, rectangular, convex parabolic and two exponential types are considered for the present investigation. An analytical technique based on the Adomian decomposition method is proposed for the solution methodology as the governing energy equations of porous fins for all the profiles are non-linear. A comparative study has been carried out among the results obtained from the porous and solid fins, and an appreciable difference has been noticed for a range of design conditions. Finally, the result shows that the heat transfer rate in an exponential profile with negative power factor is much higher than the rectangular profile but slightly higher than the convex profile. On the other hand, the fin performance is observed to be better for exponential profiles with positive power factor than other three profiles. A significant increase in heat transfer through porous fins occurs for any geometric fin compared to that of solid fins for a low porosity and high flow parameter. (C) 2012 Elsevier Ltd. All rights reserved.
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页码:7611 / 7622
页数:12
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