自适应网格与均匀网格在数值模拟中的对比研究

Comparative Study of Adaptive and Uniform Mesh Models in Numerical Simulation

采用自适应网格和均匀网格两种模式,对1996年8月3—4日发生在山西、河北、河南三省交界地区的暴雨个例进行模拟和对比研究。结果表明,自适应网格模式对所关心的天气系统及其降水的模拟精度高于均匀网格,特别是对降水、风场、急流、涡度场的模拟精度改善显著。这说明自适应网格模拟的中尺度系统特征更清晰。

A heavy rain event occuring in the boundary of Hebei,Shanxi and He'nan on 3—4th August,1996 is simulated in this paper by using an adaptive and uniform mesh model,and their results are compared.Comparing results show that the simulation accuracy of the mesoscale system and its precipitation by the adaptive mesh model is higher than the uniform mesh model,especially the accuracy of precipitation,wind and vorticity is more remarkable.All of these show that the characters of the mesoscale system simulated by the adaptive mesh model are more clear.