Numerical Studies of Phase Transitions and Two-Phase Flow in NaCl-H20 Hydrothermal Systems

NaCl-H20 水热系统相变和两相流的数值研究

• 批准号: 9907267
• 负责人: Robert Lowell
• 金额: $ 19.08万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-11-01 至 2003-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9907267&HistoricalAwards=false
• 关键词: Numerical; Studies; Phase; Transitions; Two

This proposal represents a continuation of our effort to understand two-phase flow in seafloor hydrothermal systems (more generally termed NaCl-H2O systems). With recent NSF support, we have developed a numerical code for modeling two-phase flow in a NaCl-H2O hydrothermal system called GTHSW (Georgia Tech Hydrothermal Seawater). We are also in the process of fully documenting the code so that the research community can use it. In the proposed research we will extend the code to 1000 degrees C by using corresponding states theory to calculate enthalpy for the NaCl-H2O system and improve code efficiency by modifying it for parallel computations. We will then perform fundamental and parametric modeling of NaCl-H2O systems using fundamental one and two dimensional model geometries. We will then use the code to model the Salton Sea Geothermal System, California, investigate the formation and dissipation of brine layers at the base of bottom heated seafloor systems and study the evolution of vent chlorinity in dike-heated) systems.

该提案代表了我们努力了解海底热液系统（更普遍称为NACL-H2O系统）的两相流量的努力。在最近的NSF支持下，我们开发了一种数值代码，用于在称为GTHSW（GEORGIA Tech Tech Hydrothermal Seawater）的NACL-H2O热液系统中建模两相流。我们还在充分记录代码，以便研究界可以使用它。在拟议的研究中，我们将使用相应的状态理论将代码扩展到1000度C，以计算NACL-H2O系统的焓，并通过对并行计算进行修改来提高代码效率。然后，我们将使用基本一维模型的几何形状对NaCl-H2O系统进行NACL-H2O系统的基本和参数建模。然后，我们将使用该代码对加利福尼亚州的Salton Sea Heotermal系统进行建模，研究底部加热海底系统底部的盐水层的形成和耗散，并研究堤坝加热系统中排气氯气的演化。