Concentration fluctuation models: A comparative study
Abstract
Four concentration fluctuation models are considered: Gifford's (1959) meandering plume model; Chatwin & Sullivan's (1990) model; Wilson's (Bara et al., 1992) model; and the UKADMS (Carruthers et al., 1992) model. These are described in brief, and comments made upon their ease of application to practical plume dispersion problems (e.g. the number of problem-specific empirical model parameters required). The stratified turbulent boundary layer (DNS) simulations of Cowan (1994) are described, and a concentration data-set extracted for use in evaluating the performance of the four models. Interest is mainly in the ability of the models to accurately predict the concentration fluctuation levels from the mean concentration data. However, the concentration probability density function is also studied briefly.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1994
- Bibcode:
- 1994STIN...9511939P
- Keywords:
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- Atmospheric Diffusion;
- Diffusion Theory;
- Plumes;
- Pollution Transport;
- Turbulent Boundary Layer;
- Atmospheric Boundary Layer;
- Concentration (Composition);
- Probability Density Functions;
- Transport Theory;
- Fluid Mechanics and Heat Transfer