High Fidelity Simulation of Atmospheric Dispersion

了解污染物在大气中的扩散情况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，以预测室外和室内环境中化学和生物危害的传播。为了在最短的时间内提供分析，目前使用的是经验方法，如高斯泡沫法和单区或多区模型。喷雾方法假设理想的室外排放烟羽，并忽略与复杂拓扑的相互作用。分区模型可以合理地预测建筑物中的扩散情况，但它们在大空间中的适用性是值得怀疑的，因为它们的均匀混合假设是无效的。

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