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

TURGUT O. , Sari M.

HEAT AND MASS TRANSFER, vol.49, no.4, pp.543-554, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 4
  • Publication Date: 2013
  • Doi Number: 10.1007/s00231-012-1101-z
  • Title of Journal : HEAT AND MASS TRANSFER
  • Page Numbers: pp.543-554


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.