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Numerical Modeling of Aerosol Concentration.

PB2006102419

Publication Date	2005
Personal Author	Flynn, M. R.
Page Count	16
Abstract	This is the Final Performance Report for NIOSH Grant 5 R01 OH007363- (01-03), entitled 'Numerical Modeling of Aerosol Concentration.' It is presented as a list of publications with reprints, and a discussion of how the papers relate to the Specific Aims. At the time this report was submitted, four of the nine publications were in various stages of completion - two are in press, and two are in review (see List of Publications and Reports). A brief summary of the results of these papers is found in the section entitled Specific Aims and their Relationship to the Publications. This research focused on improving the use of computational fluid dynamics (CFD) and associated numerical methods to predict size-specific aerosol concentrations with emphasis on human exposure and health. The focus was on determining uncertainties in both simulated and measured concentrations to assess the performance of the three-dimensional, steady-state k-epsilon turbulence model. Currently this is the most commonly used CFD model in applied occupational hygiene studies. Both two and three-dimensional simulations were performed using several different turbulence models with the commercial software FIDAP. In addition an in-house, 2-d time dependent vortex code was run with particle tracking. Simulations employed circular and elliptical cylinders as surrogate human forms, but in addition, a highly realistic 3-d simulation of the human form was used for aspiration studies and compared with data taken with a mannequin in wind tunnel studies.
Keywords	Mathematical models Aerosols Computational fluid dynamics Environmental exposure Public health Turbulence Simulation
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	North Carolina Univ. at Chapel Hill. Dept. of Environmental Sciences and Engineering.; National Inst. for Occupational Safety and Health, Washington, DC.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200608

Numerical Modeling of Aerosol Concentration.

Numerical Modeling of Aerosol Concentration.
PB2006102419

Publication Date	2005
Personal Author	Flynn, M. R.
Page Count	16
Abstract	This is the Final Performance Report for NIOSH Grant 5 R01 OH007363- (01-03), entitled 'Numerical Modeling of Aerosol Concentration.' It is presented as a list of publications with reprints, and a discussion of how the papers relate to the Specific Aims. At the time this report was submitted, four of the nine publications were in various stages of completion - two are in press, and two are in review (see List of Publications and Reports). A brief summary of the results of these papers is found in the section entitled Specific Aims and their Relationship to the Publications. This research focused on improving the use of computational fluid dynamics (CFD) and associated numerical methods to predict size-specific aerosol concentrations with emphasis on human exposure and health. The focus was on determining uncertainties in both simulated and measured concentrations to assess the performance of the three-dimensional, steady-state k-epsilon turbulence model. Currently this is the most commonly used CFD model in applied occupational hygiene studies. Both two and three-dimensional simulations were performed using several different turbulence models with the commercial software FIDAP. In addition an in-house, 2-d time dependent vortex code was run with particle tracking. Simulations employed circular and elliptical cylinders as surrogate human forms, but in addition, a highly realistic 3-d simulation of the human form was used for aspiration studies and compared with data taken with a mannequin in wind tunnel studies.
Keywords	Mathematical models Aerosols Computational fluid dynamics Environmental exposure Public health Turbulence Simulation
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	North Carolina Univ. at Chapel Hill. Dept. of Environmental Sciences and Engineering.; National Inst. for Occupational Safety and Health, Washington, DC.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200608