Second law analysis of rectangular channels with square pin-fins


SARA O., Yapici S. , YILMAZ M., PEKDEMIR T.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, cilt.28, ss.617-630, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 28 Konu: 5
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0735-1933(01)00266-4
  • Dergi Adı: INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
  • Sayfa Sayıları: ss.617-630

Özet

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 pinfins 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) over bar number based on the projected area decreased with increasing S-x/D and C/H, whereas (Nu) over bar 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.