Turbulent Three-Dimensional Air Flow and Trace Gas Distribution in an Inhalation Test Chamber

[+] Author and Article Information
P. W. Longest, C. Kleinstreuer

Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910

J. S. Kinsey

U. S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC 27711

J. Fluids Eng 122(2), 403-411 (Feb 09, 2000) (9 pages) doi:10.1115/1.483270 History: Received April 15, 1998; Revised February 09, 2000
Copyright © 2000 by ASME
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Geometry of in-plane chamber system: (a) inlet pipe and (b) Rochester-style human exposure chamber with inlet and outlet components
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Cross-sectional views of flow velocity vectors overlaid with absolute velocity magnitude contours: (a) mid-plane slice of test area; (b) mid-plane slice of inlet cone; (c) top view of breathing level; and (d) mid-plane slice of flow exit configuration
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Paths of stream traces in chamber
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Local distribution of mid-plane turbulence level and nondimensional dissipation rate at various downstream locations: (a) inlet to first diffuser, h=6.38 m(h*=15.70); (b) inlet to third diffuser, h=3.97 m(h*=9.77); (c) breathing level, h=1.52 m(h*=3.74); (d) floor level, h=0.00 m
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Area averaged turbulence quantities from RNG k-ε and k-ε solutions: (a) turbulence level and (b) nondimensional dissipation rate in chamber
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Measured and predicted transient CO-concentration at the outlet for an upstream step-input
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Mid-plane contours over time of CO-concentration for an upstream step-input
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Horizontal plane view taken h=1.52 m(h*=3.74) above the chamber floor of secondary velocity vectors (upper half) and quasi-steady contours of CO-concentration measured in ppmv (lower half)
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Quasi-steady contours of CO-concentration for an injection point upstream of the fourth inlet bend; consecutive horizontal plane slice positions measured upward from the partial floor




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