大气三维风场的确定与污染物浓度分布的计算

NUMERICAL DETERMINATION OF THREE-DIMENSIONAL WIND FIELD AND COMPUTATION OF POLLUTANT CONCENTRATION DISTRIBUTIONS

一、引言随着经济的发展,工业化程度越来越高,环境保护问题正日益受到人们的关注。建立 数学模型,利用计算机数值确定大气中二氧化硫等有害气体的浓度分布也愈来愈引起人们的兴趣。 本文以我国某地区为例,解决了浓度分布预测问题,求出了污染场浓度分布的演变史。首先在该地区几个观察站,测出上空少数测点上某时水平风速。

In this paper a numerical method of predicting the pollutant concentration in the atmos-phere is suggested. Method of variational approach to determinate the three dimensional windfield from the measured data at the irregularly located observation stations, is improved. Nume-rical algorithm for obtaining the physically relevant distribution of the pollutant concentrationsby solving a convection-diffusion equation is presented and an example of analysed data is pre-sented. Numerical results of the wind fields and the pollutant concentrations are given.