Verification Testing in Computational Fluid Dynamics: An Example Using Reynolds-Averaged Navier-Stokes Methods for Two-Dimensional Flow in the Near Wake of a Circular Cylinder

Details

• Personal Author:
  Richmond-Bryant J
• Description:
  Verification testing was performed for various Reynolds-averaged Navier-Stokes methods for uniform flow past a circular cylinder at Re= 5232. The standard and renormalized group (RNG) versions of the k- method were examined, along with the Boussinesq, Speziale and Launder constitutive relationships. Wind tunnel experiments for flow past a circular cylinder were also performed to obtain a comparative data set. Preliminary studies demonstrate poor convergence for the Speziale relationship. Verification testing with the standard and RNG k- models suggests that the simulations exhibit global monotonic convergence for the Boussinesq models. However, the global order of accuracy of the methods was much lower than the expected order of accuracy of 2. For this reason, pointwise convergence ratios and orders of accuracy were computed to show that not all sampling locations had converged (standard k- model: 19% failed to converge; RNG k- model: 14% failed to converge). When the non-convergent points were removed from consideration, the average orders of accuracy are closer to the expected value (standard k- model: 1.41; RNG k- model: 1.27). Poor iterative and global grid convergence was found for the RNG k-/Launder model. The standard and RNG k- models with the Boussinesq relationship were compared with experimental data and yielded results significantly different from the experiments. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Occupational Health Particulate Matter Safety Software
• Keywords:
  Aerosol-particles Airborne-particles Author Keywords: Kappa-epsilon Methods Circular Cylinder Computer-models Computer-software Near Wake Particulates Simulation-methods Verification
• ISSN:
  0271-2091
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  North Carolina ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  43
• Issue:
  12
• NIOSHTIC Number:
  nn:20029190
• Citation:
  Int J Numer Methods Fluids 2003 Dec; 43(12):1371-1389
• Contact Point Address:
  ManTech Environmental Technology, Inc., P.O. Box 12313, 27709 Research Triangle Park, NC, USA
• Email:
  richmond-bryant.jennifer@epa.gov
• Federal Fiscal Year:
  2004
• NORA Priority Area:
  Research Tools and Approaches: Exposure Assessment Methods
• Performing Organization:
  University of North Carolina Chapel Hill
• Peer Reviewed:
  True
• Start Date:
  20010930
• Source Full Name:
  International Journal for Numerical Methods in Fluids
• End Date:
  20050929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5150cb4d6fc7efa823b772356ca59e3bc3435856eb5dd21eab41182d816f84692a7bb62f80d2c3ed9f027e7b39a7c2f5f96340445a86ea918b5c3d9d61e4edee
• Download URL:
  https://stacks.cdc.gov/view/cdc/190229/cdc_190229_DS1.pdf
• File Type:
  [PDF - 233.45 KB ]