title: Modeling blast waves, gas and particles dispersion in urban and hilly ground areas.
abstract: The numerical simulation of shock and blast waves as well as particles dispersion in highly heterogeneous media such as cities, urban places, industrial plants and part of countries is addressed. Examples of phenomena under study are chemical gas products dispersion from damaged vessels, gas dispersion in urban places under explosion conditions, shock wave propagation in urban environment. A three-dimensional simulation multiphase flow code (HI2LO) is developed in this aim. To simplify the consideration of complex geometries, a heterogeneous discrete formulation is developed. When dealing with large scale domains, such as countries, the topography is considered with the help of elevation data. Meteorological conditions are also considered, in particular regarding complex temperature and wind profiles. Heat and mass transfers on sub-scale objects, such as buildings, trees and other obstacles are considered as well. Particles motion is addressed through a new turbulence model involving a single parameter to describe accurately plumes. Validations against experiments in basic situations are presented as well as examples of industrial and environmental computations.
authors.affiliation: RS2N, Bastidon de la Caou, 13360 Roquevaire, France. Electronic address: sarah.hank@rs2n.com.
authors.forename: S
authors.initials: S
authors.lastname: Hank
authors.affiliation: University Institute of France (IUF), 5 rue Enrico Fermi, 13453 Marseille, France.
authors.forename: R
authors.initials: R
authors.lastname: Saurel
authors.affiliation: Aix-Marseille Université, CNRS, IUSTI, UMR 7343 5 rue Enrico Fermi, 13013 Marseille, France.
authors.forename: O
authors.initials: O
authors.lastname: Le Métayer
authors.affiliation: CEA, DAM, GRAMAT, F-46500 Gramat, France.
authors.forename: E
authors.initials: E
authors.lastname: Lapébie
mesh_terms: D002947:Cities; D005107:Explosions; D005740:Gases; D008962:Models, Theoretical; D052638:Particulate Matter
chemical_list: D005740:Gases; D052638:Particulate Matter
keywords: Compressible flow; Fluid dispersion; Heterogeneous media; Two-phase flow