Prediction Of Species Transport In Urban Canyons Using An H-adaptive Finite Element Approach

A three-dimensional h-adaptive finite element model has been developed for predicting airflow and particulate dispersion within urban canyons. Petrov-Galerkin weighting for the advection terms, mass lumping and h- adaptation are used in the model. The code has been used for the solution of many environmental transport problems including calculation of atmospheric wind fields over the Nevada Test Site, Las Vegas Valley, and species transport for indoor environments. The use of refined grids reduces resource requirements, allowing larger problems to be run on small computer platforms. 1 Introduction Efforts are underway to develop a local, mesh-adaptive finite element model that will accurately calculate wind fields and particulate t