An analysis of entropy generation through a circular duct with different shaped longitudinal fins for laminar flow

Dagtekin I., Oztop H., Sahim A. Z.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, cilt.48, sa.1, ss.171-181, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 48 Sayı: 1
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.ijheatmasstransfer.2004.08.013
  • Dergi Adı: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.171-181
  • Anahtar Kelimeler: entropy generation, laminar flow, circular duct, longitudinal fins, CONSTANT WALL TEMPERATURE, CONVECTIVE HEAT-TRANSFER, PRESSURE-DROP, TUBES, PROFILES, OPTIMIZATION
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The present study focuses on the entropy generation analysis in a circular duct with internal longitudinal fins of different shape for laminar flow. Three different fin shapes are chosen for the analysis: Thin, triangular and V-shaped fins. Calculations are performed for various dimensionless lengths and number of fins, dimensionless temperature difference and fin angle for triangular and V-shaped fins. It is found that the number of fins and dimensionless length of the fins for both thin fins and triangular fins, and the fin angle for triangular and V-shaped fins have significant effect on both entropy generation and pumping power. Further, both entropy generation and pumping power also are influenced by dimensionless temperature difference. (C) 2004 Elsevier Ltd. All rights reserved.