High Fidelity Simulation of Atmospheric Dispersion

了解大气中污染物的扩散对基础设施规划和城市发展具有重要意义。Dstl对大气扩散预测感兴趣，以预测化学和生物危害在室外和室内环境中的传播。为了在最短的时间内提供分析，目前使用的是经验方法，如高斯泡发方法和单区或多区模型。泡芙方法假设一个理想的室外排放羽流，忽略与复杂拓扑的相互作用。区域模型可以提供合理的建筑物扩散预测，但对于大空间，其均匀混合假设无效，其适用性值得怀疑

Understanding the dispersion of pollutants in atmospheric flow is of vital importance for infrastructure planning and urban development. Dstl is interested in atmospheric dispersion prediction to forecast the spread of chemical and biological hazards in outdoor and indoor environments. To provide analyses in minimal time, empirical approaches, like Gaussian puff methods and single or multizone models, are presently used. Puff methods assume an idealised outdoor emission plume and neglect interaction with complex topologies. Zone models can provide reasonable predictions of dispersion through buildings, but their applicability is questionable for large spaces, where their homogeneous mixing assumption is invalid