Modeling of Bio-Aerosol Transport and Dispersion in a Ventilation Room

Details

• Personal Author:
  Celik IB ; Mao S ; Redrow J
• Description:
  The transport and dispersion of aerosol imbedded with influenza virus in a positively or negatively pressurized ventilation room is investigated by computational fluid dynamics (CFD) methods. Lagrangian stochastic (LS) walk model is used with several advantages of direct tracking of fluid particle trajectories, independence of the reference frame, and feasibility in conjunction with complicated flow environment. Influenza viruses are believed spread through the air via turbulent suspension and transport and infect others who walk in. The virus-containing bio-aerosols originate from the respiratory activities such as coughing and sneezing. The resulting germ-laden droplets may evaporate rapidly after they are released. Numerical simulation shows that it is justified to model these aerosols as passive scalars which neutrally follow the turbulent air flow, as a first approximation. Given the location of source (standing, sitting, or sleeping position), the semi-analytic LS model can predict the transport and dispersion of aerosols, and calculate the probability density function (PDF) or influence area of aerosols in the ventilation room. This model can also provide valuable information for ventilation control strategies with respiratory protection, such as enhanced air exchange, air filtration rate, and improved airflow patterns to reduce indoor airborne infection risk. Finally, the modeling results of this study can be extended to design and analyze virtual sampling tools for bio-aerosol particles. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Movements Communicable Diseases Influenza, Human Occupational Health Respiratory System Respiratory Tract Diseases Safety Ventilation Viral Diseases
• Keywords:
  Aerosol Particles Air Flow Bioaerosols Dispersion Infectious Diseases Influenza Mathematical Models Particle Aerodynamics Respiratory Diseases Viral Diseases
• ISBN:
  9781901769156
• Publisher:
  International Medical Press
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20060587
• Citation:
  Proceedings of the International Conference on Options for the Control of Influenza VI, June 17-23, 2007, Toronto, Ontario, Canada. Katz JM ed. London: International Medical Press, 2008 Jan; :510-512
• Editor(s):
  Katz JM
• Federal Fiscal Year:
  2008
• Performing Organization:
  West Virginia University
• Peer Reviewed:
  False
• Start Date:
  20060801
• Source Full Name:
  Proceedings of the International Conference on Options for the Control of Influenza VI, June 17-23, 2007, Toronto, Ontario, Canada
• End Date:
  20100831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9a7cfc3f7cd9f93b05965db9e5197d7c5a53dffd597e21c76fed3dacb24f40f6c6bcbca6ab53e011c114caea25acd150f56a161c8d68752205dec33098f4d226
• Download URL:
  https://stacks.cdc.gov/view/cdc/224449/cdc_224449_DS1.pdf
• File Type:
  [PDF - 459.12 KB ]