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

这一提议是我们继续努力了解海底热液系统（更一般地称为NaCl-H2O系统）中的两相流。最近NSF的支持下，我们已经开发了一个数值代码模拟在NaCl-水热液系统称为GTHSW（格鲁吉亚科技热液海水）的两相流。我们也正在对代码进行完整的文档化，以便研究社区可以使用它。在拟议的研究中，我们将通过使用对应态理论来计算NaCl-H2O系统的焓，并通过修改代码以进行并行计算来提高代码效率，从而将代码扩展到1000 ℃。然后，我们将使用基本的一维和二维模型几何形状进行NaCl-H2O系统的基本和参数化建模。然后，我们将使用该代码来模拟索尔顿海地质系统，加州，调查的形成和消散的盐水层底部加热的海底系统的基础上，并研究在堤防加热）系统的喷口氯度的演变。

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.