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Forced Convection in a Square Duct With a Wavy Wall

[+] Author Affiliations
H. Shmueli, G. Ziskind, R. Letan

Ben-Gurion University of the Negev, Beer-Sheva, Israel

Paper No. HT2013-17353, pp. V004T14A014; 6 pages
doi:10.1115/HT2013-17353
From:
  • ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology
  • Volume 4: Heat and Mass Transfer Under Extreme Conditions; Environmental Heat Transfer; Computational Heat Transfer; Visualization of Heat Transfer; Heat Transfer Education and Future Directions in Heat Transfer; Nuclear Energy
  • Minneapolis, Minnesota, USA, July 14–19, 2013
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-5550-8
  • Copyright © 2013 by ASME

abstract

In the present study, turbulent flow and heat transfer in a square duct with a heated wavy wall are investigated numerically using the Large Eddy Simulation (LES). A thorough validation of the numerical approach is done versus the existing results for both flat-wall square ducts and wavy-wall channels. It is demonstrated that a very good agreement is achieved with the literature in terms of global and local flow and heat transfer parameters.

Heated wavy surfaces of various amplitudes are explored. The results are compared with those for a completely flat duct in terms of the friction factor and Nusselt number. It is shown that the friction factor increases practically linearly with the wave amplitude. On the other hand, the Nusselt number, averaged over the entire duct length, increases more steeply for the relatively small wave amplitude, but almost reaches a plateau for a further increase in the amplitude.

Copyright © 2013 by ASME

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