Second law analysis of rectangular channels with square pin-fins

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

Research output: Contribution to journalArticle

44 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 (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.

Original languageEnglish
Pages (from-to)617-630
Number of pages14
JournalInternational Communications in Heat and Mass Transfer
Volume28
Issue number5
DOIs
Publication statusPublished - Jul 2001

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