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Verification and validation studies of the time-averaged velocity field in the very near-wake of a finite elliptical cylinder.

Authors
Flynn-MR; Eisner-AD
Source
Fluid Dyn Res 2004 Apr; 34(4):273-288
NIOSHTIC No.
20029188
Abstract
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 1.35104. 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.
Keywords
Particulates; Airborne-particles; Aerosols; Aerosol-particles; Simulation-methods; Computer-models; Computer-software
Contact
Department of Environmental Sciences and Engineering, University of North Carolina, 104 Rosenau Hall, Chapel Hill, NC 27599-7400, USA
CODEN
FDRSEH
Publication Date
20040401
Document Type
Journal Article
Email Address
mike_flynn@unc.edu
Funding Amount
719405
Funding Type
Grant
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-007363
Issue of Publication
4
ISSN
0169-5983
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Fluid Dynamics Research
State
NC
Performing Organization
University of North Carolina Chapel Hill
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