| 在井流影响下的对流－弥散问题研究 |
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| 引用本文： | 张志辉,吴吉春,薛禹群. 在井流影响下的对流－弥散问题研究[J]. 水利学报, 1995, 0(5) |
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| 作者姓名： | 张志辉 吴吉春 薛禹群 |
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| 作者单位： | 南京大学地球科学系 |
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| 摘 要： | 本文针对在对流一弥散问题的数值计算中，井点附近容易出现不合理的现象，从理论上推导出井流项（源汇项）在对流一弥散方程中的具体表达式，探讨了问题出现的原因，并提出了求解对流一弥散问题的４种计算方案．最后通过一个算例，验证了本文处理源汇项的可行性，并对４个计算方案进行了比较．计算结果表明，在实际应用中，可以忽略弹性储（释）水对溶质运移的影响，也可把注水井作为浓度第一类边界处理，经这样处理后所引入的误差不超过０．５％．
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| 关 键 词： | 对流－弥散，溶质－热量运移，数值模拟，不稳定性 |
A study on the advection-dispersion problems in the presence of wells |
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| Zhang Zhihui, Wu Jichun, Xue Yuqun. A study on the advection-dispersion problems in the presence of wells[J]. Journal of Hydraulic Engineering, 1995, 0(5) |
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| Authors: | Zhang Zhihui Wu Jichun Xue Yuqun |
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| Abstract: | The actual expression of source(sink) terms in the advection-dispersion (A-D)equation is derived theoretically in this paper to solve the problem of occurence of.irrational result in numerical simulation of A--D problems. Four numerical calculation schemes are presented. Finally, an example is calculated to demonstrate the feasibility of the treatment of source(sink)terms and to compare the results from the four schemes. The results show that the effect of aquifer elastic storage(yield) on the solute transport can be neglected and that the injection wells can be treated as the Dirichlet boundary conditions in mass and heat transport simulation.The error due to simplifications is less than 0.5%. |
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| Keywords: | advection-dispersion equation solute-heat transport numerical simulation instability. |
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