Second law analysis of rectangular channels with square pin-fins

O. N. Ara; S. Yapc; M. Ylmaz; T. Pekdemir

doi:10.1016/S0735-1933(01)00266-4

Second law analysis of rectangular channels with square pin-fins

O. N. Ara, S. Yapc, M. Ylmaz, T. Pekdemir

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

This paper presents heat transfer and friction characteristics, and the second law analysis of the convective heat transfer through a rectangular channel with square cross-sectional pin-fins attached over a flat surface. Various clearance ratios (C/H) and interfin distance ratios (S_x/D) were used, and optimum pin-fin arrays that minimize entropy generation were determined. It was found that Nu number based on the projected area decreased with increasing S_x/D and C/H, whereas Nu based on the total heat transfer area increased with increasing S_x/D and with decreasing C/H. The friction factor was found to decrease with increasing S_x/D and C/H. Smaller entropy generation numbers were obtained at lower Reynolds number, higher clearance ratio, and higher interfin spacing ratio. © 2001 Elsevier Science Ltd.

Original language	English
Pages (from-to)	617-630
Number of pages	14
Journal	International Communications in Heat and Mass Transfer
Volume	28
Issue number	5
DOIs	https://doi.org/10.1016/S0735-1933(01)00266-4
Publication status	Published - Jul 2001

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title = "Second law analysis of rectangular channels with square pin-fins",

abstract = "This paper presents heat transfer and friction characteristics, and the second law analysis of the convective heat transfer through a rectangular channel with square cross-sectional pin-fins attached over a flat surface. Various clearance ratios (C/H) and interfin distance ratios (Sx/D) were used, and optimum pin-fin arrays that minimize entropy generation were determined. It was found that Nu number based on the projected area decreased with increasing Sx/D and C/H, whereas Nu based on the total heat transfer area increased with increasing Sx/D and with decreasing C/H. The friction factor was found to decrease with increasing Sx/D and C/H. Smaller entropy generation numbers were obtained at lower Reynolds number, higher clearance ratio, and higher interfin spacing ratio. {\textcopyright} 2001 Elsevier Science Ltd.",

author = "Ara, {O. N.} and S. Yapc and M. Ylmaz and T. Pekdemir",

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T1 - Second law analysis of rectangular channels with square pin-fins

AU - Ara, O. N.

AU - Yapc, S.

AU - Ylmaz, M.

AU - Pekdemir, T.

PY - 2001/7

Y1 - 2001/7

N2 - This paper presents heat transfer and friction characteristics, and the second law analysis of the convective heat transfer through a rectangular channel with square cross-sectional pin-fins attached over a flat surface. Various clearance ratios (C/H) and interfin distance ratios (Sx/D) were used, and optimum pin-fin arrays that minimize entropy generation were determined. It was found that Nu number based on the projected area decreased with increasing Sx/D and C/H, whereas Nu based on the total heat transfer area increased with increasing Sx/D and with decreasing C/H. The friction factor was found to decrease with increasing Sx/D and C/H. Smaller entropy generation numbers were obtained at lower Reynolds number, higher clearance ratio, and higher interfin spacing ratio. © 2001 Elsevier Science Ltd.

AB - This paper presents heat transfer and friction characteristics, and the second law analysis of the convective heat transfer through a rectangular channel with square cross-sectional pin-fins attached over a flat surface. Various clearance ratios (C/H) and interfin distance ratios (Sx/D) were used, and optimum pin-fin arrays that minimize entropy generation were determined. It was found that Nu number based on the projected area decreased with increasing Sx/D and C/H, whereas Nu based on the total heat transfer area increased with increasing Sx/D and with decreasing C/H. The friction factor was found to decrease with increasing Sx/D and C/H. Smaller entropy generation numbers were obtained at lower Reynolds number, higher clearance ratio, and higher interfin spacing ratio. © 2001 Elsevier Science Ltd.

U2 - 10.1016/S0735-1933(01)00266-4

DO - 10.1016/S0735-1933(01)00266-4

M3 - Article

SN - 0735-1933

VL - 28

SP - 617

EP - 630

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

IS - 5

ER -

Second law analysis of rectangular channels with square pin-fins

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