Asymmetrical Flow to Wells - Toward a Better Understanding

不对称流向井 - 更好地理解

• 批准号: 0084733
• 负责人: Andrea Welker
• 金额: $ 2.56万
• 依托单位: Villanova University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084733&HistoricalAwards=false
• 关键词: Asymmetrical; Flow; Wells; Toward; Better

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.

流向非圆井的流动是不对称的；然而，这种不对称流通常被近似为对称流，以帮助设计计算。例如，在设计过程中，预制垂直排水管（PVD）的矩形截面经常转换为圆形截面。不幸的是，这种转换的影响还没有被完全理解。无论PVDs是用于土壤改良还是修复，无论何种应用，矩形截面都转化为圆形。已经为这种转换开发了许多不同的公式；然而，没有明确的研究表明，一种配方明显优于其他配方。提出了一个实验程序来研究当量直径公式应该基于当量流量而不是当量势的假设。预计与PVD井的横截面积最接近的当量直径井将产生最相似的流量。这项研究的结果可以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修复渗透带土壤以及非均质性对PVD修复系统的影响。选择合适的等效直径将是这些研究的重要组成部分，在进行数学建模时尤为重要。除了对研究人员有用外，工程师还可以在使用PVDs进行土壤改良和修复时使用本研究提供的信息。