Abstract: The gradient transfer theory for turbulent diffusion is reformulated in order to obtain an improved method for applied dispersion studies. The basic innovation is that diffusivity of single Fourier components of the ...

Abstract: No abstract available.

Abstract: An Eulerian model, describing the dispersion of pollutants in gases and fluids, is developed. The model is based on numerical integration of the dispersion equation, including the effect of advection, diffusion, sinks and ...

Abstract: The pseudospectral dispersion model (Christensen and Prahm, 1976) is adapted for simulation of the long-range transmission of sulphur pollutants in the European region, covering an area of about 4000 km ? 4000 km. Regional ...

Abstract: The moment method for accurate Eulerian advection computation, originally suggested by Egan and Mahoney (1972), was developed and tested for problems in two dimensions by Pedersen and Prahm (1973, 1974). A two-dimensional ...

Abstract: Further development of the spectral turbulent diffusivity concept is presented with the aim of obtaining an Eulerian dispersion model applicable for multiple interacting sources. The theory is applied for studies of plume ...