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Structured Adaptive Mesh Refinement (SAMR) Simulation of a Buoyant Helium Plume

[+] Author Affiliations
Mohit Tandon, Philip J. Smith

University of Utah

Rajesh Rawat

CD-Adapco

Andrew M. Wissink, Brian T. N. Gunney

Lawrence Livermore National Laboratory

Paper No. IMECE2005-81678, pp. 371-377; 7 pages
doi:10.1115/IMECE2005-81678
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part A
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4221-5 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

Large-Eddy Simulations (LES) are done for 7.3 cm diameter helium plume using Local Mesh Refinement in the near source region i.e., X/Dp < 2. Constant coefficient Smagorinsky Model was used. The validation of code was conducted by comparing with the experimental data collected at NIST. The simulations are validated for two different inlet velocities. Simulation results of time-averaged velocity and helium concentration fields show good agreement with experimental data in the near source regions. Discrepancies were observed between the simulations and the experimental data in regions downstream the refined region. The cause of these discrepancies is attributed to unresolved vorticity generated by buoyancy.

Copyright © 2005 by ASME

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