Verification and Validation Studies of the Time-Averaged Velocity Field in the Very Near-Wake of a Finite Elliptical Cylinder

Details

• Personal Author:
  Eisner AD ; Flynn MR
• Description:
  This paper presents verification and validation results for the time-averaged, three-dimensional velocity field immediately downstream of a finite elliptic cylinder at a Reynolds number of 1.35×104. Numerical simulations were performed with the finite element package, Fidap, using the steady state, standard k-epsilon model. The ratio of the cylinder height to the major axis of the elliptical cross section is 5.0; the aspect ratio of the cross section is 0.5625. This particular geometry is selected as a crude surrogate for the human form in consideration of further applied occupational and environmental health studies. Predictions of the velocity and turbulence kinetic energy fields in the very near-wake are compared to measurements taken in a wind tunnel using laser Doppler anemometry. Results show that at all locations where a reliable grid convergence index can be calculated there is not a demonstrable difference between simulated and measured values. The overall topology of the time-averaged flow field is reasonably well predicted, although the simulated near-wake is narrower than the measured one. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Occupational Health Particulate Matter Safety Software
• Keywords:
  Aerosol-particles Airborne-particles Computer-models Computer-software Particulates Simulation-methods
• ISSN:
  0169-5983
• 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
• Pages in Document:
  273-288
• Volume:
  34
• Issue:
  4
• NIOSHTIC Number:
  nn:20029188
• Citation:
  Fluid Dyn Res 2004 Apr; 34(4):273-288
• Contact Point Address:
  Department of Environmental Sciences and Engineering, University of North Carolina, 104 Rosenau Hall, Chapel Hill, NC 27599-7400, USA
• Email:
  mike_flynn@unc.edu
• 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:
  Fluid Dynamics Research
• End Date:
  20050929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:496fdb31813fbff4f4545d63f1f9ababa1234bca0cb391b93a0a4a7864f3e08d41f4e3055dc073f8266ccdc8ab04ac2b47a8d0adb9721d6ebbc9477f2056deaf
• Download URL:
  https://stacks.cdc.gov/view/cdc/190227/cdc_190227_DS1.pdf
• File Type:
  [PDF - 1.21 MB ]