Experimental and numerical study of turbulent flow and heat transfer inside hexagonal duct


TURGUT O. , Sari M.

HEAT AND MASS TRANSFER, cilt.49, ss.543-554, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 49 Konu: 4
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1007/s00231-012-1101-z
  • Dergi Adı: HEAT AND MASS TRANSFER
  • Sayfa Sayıları: ss.543-554

Özet

Flow and heat transfer characteristics in transition and turbulent regions are studied experimentally and numerically in a horizontal smooth regular hexagonal duct under constant wall temperature boundary condition covering a range of Reynolds number from 2.3 x 10(3) to 52 x 10(3). Two types of k-omega (standard and shear stress transport (SST)) and three types of k-epsilon (standard, renormalization (RNG), and realizable) turbulence model are employed for transition and turbulent regions, respectively. Both average and fully developed Darcy friction factor and Nusselt number are presented as a function of Reynolds number. It is seen that k-omega SST and k-epsilon realizable turbulence models gave the best agreement with the experimental data in transition and turbulent regions, respectively. All the experimental results are correlated within an accuracy of +/- 13 % and +/- 7 % for Nusselt number and Darcy friction factor, respectively. Results obtained in this study are compared with circular duct results using hydraulic diameter.