Three dimensional groundwater quality modelling in heterogeneous media
Three dimensional groundwater quality modelling in heterogeneous media
复制标题
异质介质中的三维地下水质量建模
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
R. Mosé
中科院分区：
文献类型：
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作者：
K. Semra;R. Mosé
本文提出了一个三维污染物输运模式。该代码是基于粒子跟踪技术：随机行走方法，这是基于对流扩散方程和福克-普朗克方程之间的类比。速度场的计算采用混合杂交有限元法。为了避免粒子在具有色散差异的区域中的累积，开发了一种新的有效方法，以允许在高色散区域和低色散区域之间的通量守恒。通过一个层状含水层算例，将该方法与其它常用算法进行了比较，表明了该方法的有效性。为了验证代码，在实验室模型上进行了三维实验模拟。它是一个长约6米、宽约1米、深约1米的非均质含水层。多孔介质由三种不同的沙子制成。氯化钠用作示踪剂。模拟值和实测值之间的比较表明，非常令人满意的结果。
A three dimensional pollutant transport model is presented. The code is based on a particle tracking technique : the random-walk method, which is based on the analogy between the advection-dispersion equation and the Fokker-Planck equation. The velocity field is calculated by a mixed hybrid finite element method. To avoid particle accumulation in regions with dispersion contrasts, a new efficient method is developed to allow conservation of the fluxes between high and low dispersive regions. Comparisons are made on a layered aquifer example between this method and other algorithms commonly used and show the efficiency of the new method. To validate the code, a 3D experiment made on a laboratory model have been simulated. It represents a heterogeneous aquifer of about six meter length, one meter width and one meter depth. The porous medium is made from three different sorts of sand. Sodium chloride is used as tracer. Comparisons between simulated and measured values show very satisfactory results.