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Numerical Simulation Study of Groundwater Flow Characteristics in Single Rough Fractures

机译：单个粗糙裂缝中地下水流动特征的数值模拟研究

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摘要

Study on the flow characteristics of groundwater has become a key research direction of environmental and hydrological geology field in rock fractures.The software Fluent?6.2.2 is applied in this paper to simulate fluid flow in single fractures with different shape roughness element and analyzes the relativity between related parameters.Main conclusions are drawn as followings:(1)The flow streamlines near the rough element is complicated,a reflux phenomena will appear after the rough element,The velocity distribution shows the shape of the rough element has different degree of influence on water flow in fractured media.(2)The relationship between average velocity and hydraulic gradient(V-J) in fractured media is nonlinear obviously.Forchherimer equation and Izbash equation can fit the V-J curve well.(3)The fitting effect of Forchherimer equation is better than that of the Izbash equation,as the increasing of flow rate.
机译：对地下水渗流特征的研究已成为岩石裂缝环境和水文地质领域研究的重要方向。本文采用Fluent？6.2.2软件模拟了具有不同形状粗糙度元素的单个裂缝中的流体流动，并对其进行了分析。主要结论如下：（1）粗糙单元附近的流线复杂，在粗糙单元之后会出现回流现象，速度分布表明粗糙单元的形状具有不同程度的影响（2）裂隙介质中的平均速度与水力梯度（VJ）之间的关系是明显的非线性。Forchherimer方程和Izbash方程可以很好地拟合VJ曲线。（3）Forchherimer方程的拟合效果是随着流量的增加，比Izbash方程更好。

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