An Experimental Investigation of the Effect of Flow Obstacles on Single-Phase Heat Transfer
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
B3-1 Core Thermalhydraulics and Subchannel Analysis

Aurelian Tanase (CNSC, University of Ottawa)
Dionysisus Groeneveld (University of Ottawa)
Hussam Zahlan (University of Ottawa)


The paper presents and discusses the experimental results obtained for various geometries and flow parameters (such as the obstruction ratio, obstacle shape, Re number) that may impact the single phase heat transfer in tubes equipped with flow obstacles. A review of previous work and current experimental data suggest that the main enhancement mechanisms are disruption of viscous boundary layer, enhancement of turbulent mixing and fin effect. The enhancement effects were observed  up to 50 diameters downstream of a flow obstacle.  Comparisons of the measured heat transfer enhancement with existing and a newly proposed prediction methods are presented.

Individual Conference-Paper Copies (Electronic Where Available):

  • For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
  • For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
  • Contact the CNS office to order reprints.