RS2N, Bastidon de la Caou, 13360 Roquevaire, France.
University Institute of France (IUF), 5 rue Enrico Fermi, 13453 Marseille, France.
J Hazard Mater. 2014 Sep 15;280:436-49. doi: 10.1016/j.jhazmat.2014.08.011. Epub 2014 Aug 17.
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.
针对城市、城市地区、工业工厂和部分国家等高度非均匀介质中的冲击波和爆炸波以及颗粒弥散的数值模拟进行了研究。正在研究的现象示例包括从受损容器中逸散的化学气体产物、爆炸条件下城市地区的气体弥散、城市环境中的冲击波传播。为此目的开发了一个三维模拟多相流代码 (HI2LO)。为了简化对复杂几何形状的考虑，开发了一种非均匀离散公式。在处理像国家这样的大规模区域时，借助高程数据考虑地形。还考虑了气象条件，特别是复杂的温度和风向分布。还考虑了建筑物、树木和其他障碍物等亚尺度物体上的热和质量传递。通过涉及单个参数的新湍流模型来解决颗粒运动问题，该模型可准确描述羽流。还展示了针对基本情况的实验验证以及工业和环境计算的示例。
