| 含裂隙介质污染物输运及生物降解不同时间尺度过程的计算方法 |
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| 引用本文： | 李家伦,洪钟祥,孙菽芬.含裂隙介质污染物输运及生物降解不同时间尺度过程的计算方法[J].环境科学学报,1999,19(5):494-499. |
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| 作者姓名： | 李家伦 洪钟祥 孙菽芬 |
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| 作者单位： | 1. 中国科学院大气物理研究所,大气边界层物理与大气化学国家重点实验室
2. 中国科学院大气物理研究所,大气科学与地球流体力学数值模拟国家重点实验室,北京,100029 |
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| 摘 要： | 讨论了含裂隙介质地下水污染物输运与生物降解非线性方程组数值求解方法。用三次迎风插值方法计算裂隙介质中常见的场变量陡变化问题，用劈裂算子法，解决了方程中对流扩散过程与生化过程非线性耦合，并对快速生化反应项，利用对流项与该反应项的特征时间量级估算，给出了求生化过程作用子步的时间步长估算办法。用上述方法所得到的模拟结果与解析和实验结果对比，吻合很好。
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| 关 键 词： | 数值方法 生物降解 地下含水层 |
| 收稿时间： | 1998/2/11 0:00:00 |
| 修稿时间： | 1999/1/28 0:00:00 |
Numerical simulation of biodegradation of contaminants in the fractured media |
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| LI Jialun,HONG Zhongxiang and SUN Shufen.Numerical simulation of biodegradation of contaminants in the fractured media[J].Acta Scientiae Circumstantiae,1999,19(5):494-499. |
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| Authors: | LI Jialun HONG Zhongxiang and SUN Shufen |
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| Institution: | LAPC, Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029,LAPC, Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029 and LASG, Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | A numerical method for simulation of transport and biodegradation of contaminants in the fractured media is discussed.The cubic spline method was used to solve the advection flow dominated problem which often occurs in the fracture media.The Splitting\|Operator was used to decouple the advection and diffusion terms with biochemical term in the equations.Smaller time step for solving fast biochemical terms was introduced through comparing the order of characteristic time of biochemical term with that of advection (diffusion) term.Final numerical simulation results showed good agreement with analytical solution as well as experimental results. |
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| Keywords: | numerical method biodegradation subsurface acquifer |
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