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Characteristics of Groundwater Multi-pattern Flow in Standing Column Well


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Characteristics of Groundwater Multi-pattern Flow in Standing Column Well
NI Long12YU Yan-shun3JIANG Yi-qiang1YAO Yang1MA Zui-liang1LI Bing-xi2
1.Institute of Heat Pump and Air Conditioning Technology,Harbin Institute of Technology,Harbin 150090,China;2.School of Energy Science and Engineering,Harbin Institute of Technology,Harbin150001,China;3.School of Power Engineering,NUST,Nanjing 210094,China
standing column wells groundwater flow pattern pipe flow seepage
To research the groundwater flow mechanisms of standing column well(SCW),the uniform mathematical model of the groundwater multi-pattern flow in SCW is established by introducing coupled seepage-pipe model.The correctness of the model is validated via comparison of the numerical simulations with the experimental results.In this model,the flow boundary conditions are moved to the wellhead,and the boundary of flow-in or flow-out at the borehole wall is transferred to the calculation region.The flow distribution at the borehole wall doesn’t need to pre-set.A numerical simulation is made on a typical SCW applying this mathematic model.The results show that there is a recharging effect in the upper aquifer and a pumping effect in the lower aquifer,and the groundwater exchange occurs in the borehole and local aquifer via the borehole wall when a SCW is operated.The ratio for original groundwater exchange achieves 29.6% in this sample case.


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Last Update: 2010-06-30