Puff-on-cell model for computing pollutant transport and diffusion

Technical Report · Wed Jan 01 04:00:00 EST 1975

DOI:https://doi.org/10.2172/8569225· OSTI ID:8569225

Sheih, C. M.

Most finite-difference methods of modeling pollutant dispersion have been shown to introduce numerical pseudodiffusion, which can be much larger than the true diffusion in the fluid flow and can even generate negative values in the predicted pollutant concentrations. Two attempts to minimize the effect of pseudodiffusion are discussed with emphasis on the particle-in-cell (PIC) method of Sklarew. This paper describes a method that replaces Sklarew's numerous particles in a grid volume, and parameterizes subgrid-scale concentration with a Gaussian puff, and thus avoids the computation of the moments, as in the model of Egan and Mahoney by parameterizing subgrid-scale concentration with a Guassian puff.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• OSTI ID: 8569225
• Report Number(s): ANL-75-60(Pt.4)
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR
AIR POLLUTION
CHEMICAL EFFLUENTS
DIFFUSION
ENVIRONMENTAL TRANSPORT
FLUID FLOW
FLUIDS
GASEOUS WASTES
GASES
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICS
METEOROLOGY
POLLUTION
STATISTICAL MECHANICS
SURFACE AIR
WASTES