Mathematical Simulation Of Ammonia Gas
Release In A Complex Urban Terrain Using CFD
And A Statistical Approach
Author(s)
M. Kozubková, M. Bojko, O. Zavila, P. Danihelka
& L. Maléřová
Abstract
Major accident prevention and preparedness involve the determination of a toxic
substance expected or actual release dispersion in the atmosphere, i.e.,
mathematical modeling of liquid mechanics phenomena. Nowadays, statistical
mathematical models are usually used to model simulations of emergency
situations in facilities in urban areas or in industrial complexes. Numerical CFD
codes have been used mostly for specialized and detailed spatial analyses of
physical and chemical phenomena and situations in enclosed spaces. With
increasing computing power, these models are beginning to be applied also to
complex problems in open spaces, including chemical accidents. Statistical and
dynamic models give different results as the principles of the two methods, and
the quantity and types of input parameters are different.
The article directly compares the results of simulations of accidental gaseous
ammonia releases from an ice arena into a complex urban area, obtained from
ALOHA 5.4.3 statistical model and ANSYS Fluent 13.0 numerical CFD model.
Real meteorological data were used for the simulations. It emerged that the
results of statistical and CFD models may differ radically. The CFD model
provided better quality data for addressing accidents.
Keywords
ALOHA 5.4.3, ANSYS Fluent 13.0, CFD, ammonia, dispersion modeling
Related Book
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