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Author(s)

     Dongil Chang, Stavros Tavoularis

Title

      Simulations of turbulence, heat transfer and mixing across narrow gaps between rod-bundle subchannels

Publication Name

     Nuclear Engineering and Design

Publication Type

     Journal
Publisher
      Elsevier
Place
     
Editor(s)
     
Number
     
School
     
Volume
      238
Chapter
     
Pages
      109-123
Other Publication Information
     
Publication Year
     2008
Abstract
      Turbulent flow and temperature fields were determined numerically in a rectangular duct containing a heated rod. As the spacing δ between the rod and the duct wall decreased from 0.10D (D is the rod diameter) to 0.03D, coherent turbulent kinetic energy and temperature fluctuations dramatically increased in the gap region, but, for δ = 0.01D, coherent fluctuations essentially disappeared. As δ/D → 0, the frequency of coherent fluctuations decreased and cross-gap mixing weakened, contrary to predictions based on extrapolated available empirical correlations.
Keywords
     rod-bundle, URANS, mixing factor
Website
     http://www.elsevier.com
Paper Status
     Published
DOI / Publication ID
     



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