Applying the Discrete Vortex Method in Environmental Fluid Mechanics: A Study of the Time-Averaged Near Wake Behind a Circular Cylinder

Details

• Personal Author:
  Flynn MR ; Richmond-Bryant J ; Flynn MR ; Richmond-Bryant J
• Description:
  This work illustrates the discrete vortex method (DVM) as a tool for simulating environmental fluid mechanics problems involving transport in the wake of a bluff body. The DVM was used to model both the long-time-averaged and instantaneous features of flow past a circular cylinder. Simulations were performed for Re = 140, 000. Verification testing was accomplished by refining time-step and vortex element circulation. The DVM was validated through comparison with experimental data from Cantwell and Coles. Verification testing demonstrated that, while global convergence is not possible for an unsteady flow simulation, it is possible to have convergence to physical results. This verification entails identifying a range of parameters in which a flow containing coherent structures and matching physical conditions is attainable. Validation tests demonstrated excellent agreement between experimental and simulated results for time-averaged velocity and shear stress profiles, as well as Strouhal number. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Occupational Health Particulate Matter Safety Software
• Keywords:
  Aerosol-particles Airborne-particles Author Keywords: Bluff Bodies Computational Fluid Dynamics Computer-models Computer-software Environmental Fluid Mechanics Near Wake Particulates Simulation-methods Vortex Methods

  More +
• ISSN:
  1567-7419
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article ; Journal Article
• Place as Subject:
  North Carolina ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Pages in Document:
  455-463
• Volume:
  4
• Issue:
  4
• NIOSHTIC Number:
  nn:20029189
• Citation:
  Env Fluid Mech 2005 Jan; 4(4):455-463
• 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:
  2005
• NORA Priority Area:
  Research Tools and Approaches: Exposure Assessment Methods ; Research Tools and Approaches: Exposure Assessment Methods
• Performing Organization:
  University of North Carolina Chapel Hill
• Peer Reviewed:
  True
• Start Date:
  20010930
• Source Full Name:
  Environmental Fluid Mechanics
• End Date:
  20050929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:bde22f0f5a9449d8e194ba0857140692c25a71891ca62c7ea1757caa817aa8528f0208d5eaa059859d3386e2f3ce477b55cba8e82d7297280befb19a5e76e32f
• Download URL:
  https://stacks.cdc.gov/view/cdc/190228/cdc_190228_DS1.pdf
• File Type:
  [PDF - 134.69 KB ]