Asymmetrical Flow to Wells - Toward a Better Understanding

流向非圆形井的流动是不对称的；然而，为了辅助设计计算，这种不对称流动通常被近似为对称流动。例如，在设计过程中，预制垂直排水管(PVD)的矩形横截面经常被转换为圆形横截面。不幸的是，人们还没有完全了解这种转变的影响。无论PVD是用于土壤改良还是修复，无论其应用如何，矩形横截面都将转换为圆形。已经为这种转换开发了许多不同的配方；然而，没有明确地表明一种配方优于其他配方的确凿研究。提出了一个实验方案，以研究当量直径公式应基于当量流量而不是等势能的假设。预计具有最接近PVD横截面面积的等效直径井将产生最相似的流量。这项拟议研究的结果可用于本研究人员和其他人感兴趣的未来研究工作。例如，计划研究利用PVD修复包气带土壤以及非均质性对PVD修复系统的影响。选择合适的当量直径将是这些研究的重要部分，在进行数学建模时尤其重要。除了对研究人员有用外，工程师还可以在使用PVD进行土壤改良和修复时使用本研究提供的信息。

The flow towards noncircular wells is asymmetrical; however, this asymmetrical flow is often approximated as symmetrical flow to aid in design calculations. For example, the rectangular cross section of a prefabricated vertical drain (PVD) is often converted to a circular cross section during design. Unfortunately, the impact of this conversion is not fully understood. Regardless of whether PVDs are used for soil improvement or remediation, the rectangular cross section is converted to a circle regardless of the application. Many different formulations for this conversion have been developed; yet no definitive research exists that clearly shows one formulation to be superior to the others. An experimental program is proposed to study the hypothesis that equivalent diameter formulations should be based upon equivalent flow rates instead of equipotentials. It is anticipated that the equivalent diameter well with the cross-sectional area closest to that of the PVD will yield the most similar flow rates. The results of this proposed research can be used in future research efforts of interest to this researcher and others. For example, studies on the use of PVDs to remediate soils in the vadose zone and the impact of heterogeneities on PVD remediation systems are planned. Selecting the appropriate equivalent diameter will be an important part of these studies, and will be especially important when performing mathematical modeling. In addition to being of use to researchers, engineers can use the information provided by this study when using PVDs for soil improvement and remediation.