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Graetz Problem in Ducts of Circular and Some Non-Circular Cross-Sections With Viscoelastic Fluids

[+] Author Affiliations
Filali Abdelkader, Lyes Khezzar, Dennis A. Siginer

The Petroleum Institute, Abu Dhabi, UAE

Zoubir Nemouchi

Université Mentouri Constantine, Constantine, Algeria

Paper No. IMECE2011-62210, pp. 149-154; 6 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5492-1
  • Copyright © 2011 by ASME


An investigation of heat transfer with viscoelastic fluids in straight pipes of circular and some non-circular cross-sections is carried out. The influence of the rheological parameters on heat transfer enhancement with viscoelastic fluids in the entrance region of tube flow is investigated with negligible axial heat conduction and viscous dissipation. Numerical simulations are conducted with constant wall heat flux for the Graetz problem using the finite element based software Polyflow for viscoelastic fluids of the simplified Phan-Thien Tanner (SPPT) type. It is found that increasing the fluid elasticity, for all cross-sections, raises the normalized heat transfer coefficient for relatively low elasticity values but for high level of fluid elasticity the normalized heat transfer coefficient decreases.

Copyright © 2011 by ASME



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