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Numerical Study on the Influence of Non-Uniform Wall Roughness on Vortex Structure in Sparse Lattice

[+] Author Affiliations
Hongguang Xiao, Yangwei Zhang, Binghuo Yan, Wenzhen Chen

Naval University of Engineering, Wuhan, Hubei, China

Paper No. ICONE21-15194, pp. V003T10A011; 7 pages
doi:10.1115/ICONE21-15194
From:
  • 2013 21st International Conference on Nuclear Engineering
  • Volume 3: Nuclear Safety and Security; Codes, Standards, Licensing and Regulatory Issues; Computational Fluid Dynamics and Coupled Codes
  • Chengdu, China, July 29–August 2, 2013
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5580-5
  • Copyright © 2013 by ASME

abstract

Quasi periodic large scale vortex structure is an important phenomenon in rod-bundle-like lattice, which also plays an important role in the local flow and heat transfer around bundles. In this work, the heat transfer and vortex structure in sparse lattice with non-uniform wall roughness are investigated with the unsteady Reynolds-Averaged Navier-Stokes (URANS) simulation with a Reynolds Stress Model (RSM) in FLUENT 6.3. The pitch to diameter ratio (P/D) of the sparse lattice is 1.12. It is found that the transverse flow mixing, heat transfer and the vortex structure are enhanced with the wall roughness increasing.

Copyright © 2013 by ASME

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