Numerical Investigation of Aerosolization in the Venturi Dustiness Tester: Aerodynamics of a Particle on a Hill

Details

• Journal Article:
  Journal of Fluids Engineering
• Personal Author:
  Palakurthi, Nithin K. ; Ghia, Urmila ; Turkevich, Leonid A.
• Description:
  Understanding particle detachment from surfaces is necessary to better characterize dust generation and entrainment. Previous work has studied the detachment of particles from flat surfaces. This work generalizes this to investigate the aerodynamics of a particle attached to various locations on a model hill. This work serves as a model for dust aero solization in a tube, as powder is injected into the Venturi dustiness tester (VDT). The particle is represented as a sphere in a parallel plate channel, or, in two dimensions, as a cylinder oriented perpendicular to the flow. The substrate is modified to include a conical hill (3D) or wedge (2D), and the test particle is located at various positions on this hill. The governing incompressible Navier-Stokes equations are solved using the finite volume FLUENT code. The coefficients of lift and drag are compared with the results on the flat substrate. Enhanced drag and significantly enhanced lift are observed as the test particle is situated near the summit of the hill. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Computational Fluid Dynamics Dust Fungi Occupational Health Safety
• Keywords:
  Author Keywords: Drag; Lift; Aerosolization; Dustiness; Computational Fluid Dynamics Particle Aerodynamics; Dusts; Surface Properties; Models; Aerosol Particles; Airborne Particles; Molds; Bacteria; Nanoparticles;
• Source:
  J Fluids Eng 2022 Jun; 144(6):061113
• ISSN:
  0098-2202
• Pubmed ID:
  35673360
• Pubmed Central ID:
  PMC9170177
• Document Type:
  Text
• Funding:
  CC999999/ImCDC/Intramural CDC HHSUnited States/
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DFSE - Division of Field Studies and Engineering
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  30 pdf pages
• Volume:
  144
• Issue:
  6
• NIOSHTIC Number:
  nn:20065441
• Contact Point Address:
  Leonid A. Turkevich, National Institute for Occupational Safety and Health (NIOSH), Prevention (CDC), Division of Field Studies and Engineering, Engineering and Physical Hazards Branch, 1090 Tusculum Avenue, Cincinnati, OH 45226
• Email:
  LLT0@cdc.gov
• Federal Fiscal Year:
  2022
• NORA Priority Area:
  Manufacturing
• Peer Reviewed:
  True
• Collection(s):
  National Institute for Occupational Safety and Health CDC Public Access
• Main Document Checksum:
  urn:sha-512:5cb5fe85e017bb8d077c2dec2e8790407043acd4e27ca9acd4109a0cb4bc6b4e9f6a3ec1c99c93084592d125f31ddb3d0e86a229dffd9664982f9714944aa47e
• Download URL:
  https://stacks.cdc.gov/view/cdc/119239/cdc_119239_DS1.pdf
• File Type:
  [PDF - 1.85 MB ]