Transport and Diffusion of Buoyant Material.
Abstract
Transport and diffusion of dust and nonbuoyant smokes are simulated realistically by the particle model originally developed at the US Army Atmospheric Sciences Laboratory by Ohmstede and Stenmark. A new and simple algorithm accounts for buoyant smokes and/or dust. This technique uses the difference in temperature between individual particles and the ambient atmosphere to compute an additional vertical acceleration. The technique takes into consideration entrainment at the sides and top of the cloud, as well as the ingestion of unheated material at, or loss of heat by contact with, the ground during initial release and during subsequent surface contact. Some sample computer runs suggest that the particle model with this new algorithm can model realistically the transport and diffusion of buoyant material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1983
- Accession Number
- ADA132613
Entities
People
- James L. Cogan
Organizations
- Atmospheric Sciences Laboratory