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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2138

Title: Simulation of short-range diffusion experiment in low-wind convective conditions
Authors: Sharan, Maithili
Yadav, Anil Kumar
Modani, Manish
Keywords: Mathematical model
Low wind dispersion
Friction velocity
Model simulation
Issue Date: 2002
Citation: Atmospheric Environment, 36(11), 1901 - 1906p.
Abstract: A previously obtained analytical solution to model the short-range dispersion of pollutants in low winds from surface releases has been used to simulate diffusion tests conducted during winter in weakly convective conditions at the Indian Institute of Technology (IIT) Delhi. The turbulence parameterization based on friction velocity has been tested to simulate diffusion experiment. Such a parameterization in this study is considered justifiable on two counts: (1) prevailing meteorological and dispersion conditions have been generally of weakly unstable type as indicated by values of Monin–Obukhov length and bulk Richardson number, (2) uncertainties associated with the application of convective velocity based similarity parameterization to simulation of diffusion experiment at IIT Delhi, resulting in significant underprediction in most of the cases (Atmos. Environ. 30 (1996a) 1137). With this parameterization, the model simulations have improved considerably and compare reasonably well with the observations. Further, the results from a simple Gaussian model have been included for comparison. This study is in continuation of the work done earlier to simulate near-source dispersion in weak winds.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2138
Appears in Collections:Atmospheric Sciences [CAS]

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