DIFFUSION PROBLEMS NEAR TUNNEL PORTALS IN BUILT-UP AREAS

the dispersion of gases emitted by a street tunnel was determined in a boundary-layer wind tunnel. The wind directions, the velocity ratio u(sub wind)/u (sub outlet) and the building pattern were varied. It is shown that the dispersion is determined by these parameters. The results for homogeneous roughness are compared with those from other authors. The different building patterns are found to be important. It is shown that in comparison with uniformly rough surface diffusion, the position of the exhaust plume axis is shifted and the spread rate of the diffusion plume is increased. For practical calculations the influence of the building pattern should be taken into account.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00489697
• Corporate Authors:

  Elsevier

  Radarweg 29
  Amsterdam,   Netherlands  1043 NX
• Authors:
  • Bachlin, W
  • KLEIN, P
• Publication Date: 1994-5-23

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 377-385
• Serial:
  • Science of the Total Environment
  • Volume: 147
  • Publisher: Elsevier
  • ISSN: 0048-9697
  • Serial URL: http://www.sciencedirect.com/science/journal/00489697

Subject/Index Terms

• TRT Terms: Diffusion (Optics); Exhaust gases; Plumes; Pollutants; Tunnels; Ventilation systems
• Old TRIS Terms: Dispersions
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00712564
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 12 1995 12:00AM