| 污染物大气扩散数值模拟中伪扩散的控制 |
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| 引用本文： | 张智力,张旭.污染物大气扩散数值模拟中伪扩散的控制[J].同济大学学报(自然科学版),2004,32(1):35-38. |
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| 作者姓名： | 张智力 张旭 |
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| 作者单位： | 同济大学,暖通空调及燃气研究所,上海,200092 |
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| 摘 要： | 用数值模拟的方法预测污染物在大气中的扩散已经被广泛采用,但数值模拟产生的伪扩散一直是影响模拟结果精度的重要因素.为此分析了数值模拟中伪扩散产生的原因,用一阶迎风差分和对流项二次迎风插值格式对一稳态污染物扩散模型进行了计算,并比较了计算结果,得出了有实际意义的结论.
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| 关 键 词： | 数值模拟 数值误差 伪扩散 对流项二次迎风插值格式 |
| 文章编号： | 0253-374X(2004)01-0035-04 |
False Diffusion Control in Simulation of Pollutants' Diffusion in Air |
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| ZHANG Zhi-li,ZHANG Xu.False Diffusion Control in Simulation of Pollutants'''' Diffusion in Air[J].Journal of Tongji University(Natural Science),2004,32(1):35-38. |
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| Authors: | ZHANG Zhi-li ZHANG Xu |
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| Abstract: | Numerical simulation of pollutants' diffusion in air has been adopted widely, but the false diffusion occurring in simulation is always an important factor affecting the accuracy of the results. The causes of false diffusion are analyzed theoretically. A steady pollutant diffusion model is simulated using first-order upwind difference scheme and quadratic upwind interpolation of convective kinematics scheme respectively. Then we compare the results, and get some suggestion. |
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| Keywords: | numerical simulation numerical error false diffusion quadratic upwind interpolation of convective kinematics scheme |
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