Particle deposition in turbulent duct flows - comparisons of different model predictions

Details

• Personal Author:
  Ahmadi G ; Tian L
• Description:
  Numerical studies of transport and deposition of nano- and micro-particles in turbulence flow field have been studied in the past few decades. In most current industrial applications, Reynolds averaged turbulence models were used due to its relative simplicity and computational efficiency. In this work, a series of numerical simulations were conducted to study the transport and deposition of nano- and micro-particles in a turbulent duct flow using different turbulence models. Commercial software (FLUENTTM 6.1.22) was used for turbulence mean flow simulation. Simulations of the instantaneous turbulence fluctuation with and without turbulence near wall correction, and particle trajectory analysis were performed with the in-house PARTICLE (object-oriented C++) code, as well as with FLUENTTM code with and the use of user's defined subroutines. The simulation results for different cases were compared with the available experimental data, and the accuracy of various approaches was evaluated. In addition, the importance of turbulence model, boundary conditions, and turbulence fluctuation particularly near wall on particle transport and deposition were carefully evaluated. It was shown that when sufficient care was given to the modeling effort, the particle deposition rates could be predicted with reasonable accuracy. The presented results could provide guidelines for selecting appropriate procedure for simulating nanoand micro-particle transport and deposition in various applications. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Asbestos Chemistry Computers Dust Environmental Monitoring Inhalation Exposure Inorganic Chemicals Occupational Health Particulate Matter Risk Assessment Risk Factors Safety Software

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• Keywords:
  Aerosol-particles Air-sampling Airborne-fibers Analytical-processes Asbestos-dust Asbestos-fibers Author Keywords: Particle Deposition Chemical-reactions Computer-models Computer-software Exposure-levels Fibrous-dusts Inhalants Model Comparison Models Nano-particles Particulates Risk-factors Sampling Turbulent Flow

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• ISSN:
  0021-8502
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New Mexico ; New York ; OSHA Region 2 ; OSHA Region 6
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  377-397
• Volume:
  38
• Issue:
  4
• NIOSHTIC Number:
  nn:20044478
• Citation:
  J Aerosol Sci 2007 Apr; 38(4):377-397
• Contact Point Address:
  Goodarz Ahmadi, Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY 13699-5725, USA
• Email:
  ahmadi@clarkson.edu
• Federal Fiscal Year:
  2007
• Performing Organization:
  Lovelace Biomedical & Environmental Research, Albuquerque, New Mexico
• Peer Reviewed:
  True
• Start Date:
  20020901
• Source Full Name:
  Journal of Aerosol Science
• End Date:
  20080831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:99640dd27cb01880365ff44e076e132199557a932c84cda8d41fab3c896e24999df65318d6dcbe2f2442c111766320a4ee0c7fa8e8c2032b3ded8b9fba6280d2
• Download URL:
  https://stacks.cdc.gov/view/cdc/200168/cdc_200168_DS1.pdf
• File Type:
  [PDF - 822.27 KB ]