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TECHNICAL PAPERS

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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References

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Kleinstreuer, C., 1997, Engineering Fluid Dynamics—An Interdisciplinary Systems Approach, Cambridge University, New York.
Comer, J. K., Kleinstreuer, C., Longest, P. W., Kim, C. S., and Kinsey, J. S., 1998, “Computational Aerosol Transport and Deposition Analyses for Human Exposure Chambers and Model Respiratory Airways,” Proceedings of FEDSM’98, Paper No. 4811, Washington, DC.
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Longest,  P. W., and Kleinstreuer,  C., 1997, Phase I Report: Simulation and Analysis of Turbulent Three Dimensional Air Flow and Mass Transfer in Rochester Chamber Three, Research Report for the U.S. EPA. MAE Department, N. C. State Univ., Raleigh, NC.
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Fraser,  H., 1958, “The Turbulent Boundary Layer in a Conical Diffuser,” J. Hydraul. Div., Am. Soc. Div. Eng., 1684, pp. 1–17.
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Figures

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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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