复杂地形上湍流扩散的数值模拟

NUMERICAL SIMULATION OF TURBULENT DIFFUSION OVER A COMPLEX TERRAIN

中文摘要:

      本文采用准静力大气热力——动力学方程组和平流扩散方程的数值解方法,模拟了汾河河谷地区的流场、温度场和浓度场。所得结果和1984年春该地区进行的一次SF₆示踪试验资料做了对比。计算浓度场采用了三种方法:一般网格的数值模式、套网格数值模式和正态模式。和实测值的比较表明,套网格模式给出较好的计算结果,并且不需要增加过多的计算时间。

英文摘要:

      A set of hydrostatic atmospheric thermo-dynamic equations and diffusion equation are solved numerically to simulate the flow,temperature and conceniration fields over Fenhe valley,Shanxi Province.The results are compared with the data observed in a tracer experiment carried out in Spring of 1984.The concentration distributions are calculated by three approaches:ordinary numerical grids model,nested grids model and Gaussian model.The comparison shows that the nested了grids model gives better results and heeds pnly a little more computer time