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中文摘要：
使用数值模拟的方法研究污染物的传播。通过提高计算方法在一定网格规模下准确分辩和刻画各种尺度流动结构的能力,从而提高小尺度污染传播数值预报的精度。对常用格式的分辨率进行了细致比较,结果表明紧致格式无论在分辨率,还是在模版尺寸上均有较大优势。此外,在模拟带有局部高浓度区的传播问题时,格式的耗散性直接影响计算的准确性和稳定性,常用的差分格式很难得到理想的结果。而改用紧致格式后,取得了比较理想的效果。
英文摘要：
The propagation of pollution is numerical simulated.The prediction accuracy of pollution propagation is improved by improving the resolution under certain grid scale and the ability of describing various scale of flowing structure.After detailed comparison of resolution commonly used,the results show that compact scheme has its priority over either resolution or template size.Moreover,on the simulation of the propagation problem with local high concentration,the stability and robustness of the simulation ar...
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