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Estimation of Loss Coefficient for T-Junction by an Entropy Production Approach

[+] Author Affiliations
Y. Ji, H.-C. Zhang, Yi.-N. Zhang, Y. Li, L.-M. Yan

Harbin Institute of Technology, Harbin, China

Paper No. ICONE22-30934, pp. V02BT09A036; 8 pages
  • 2014 22nd International Conference on Nuclear Engineering
  • Volume 2B: Thermal Hydraulics
  • Prague, Czech Republic, July 7–11, 2014
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-4591-2
  • Copyright © 2014 by ASME


A T-junction structure is common in nuclear reactor systems, and plays an essential role in safety operation. An accurate estimation of the resistance characteristics of a T-junction is important for both energy conservation and engineering design. In the current study, the concept of the head loss coefficient K for a local structure was proposed, and its thermodynamic definition is extended to laminar flow within a T-junction by an entropy production approach, which was initially for turbulent flows. Specific numbers of K was determined by integration of the entropy generation rate obtained from a numerical simulation. In addition, the correlation between K and Re of combining and dividing flows was also derived.

Copyright © 2014 by ASME
Topics: Entropy , Junctions



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