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The Onset of Convection in Faulted Aquifers

机译：故障含水层中的对流发作

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In any geological formation, faults play an important role as they can range from impermeable seals to fluid pathways. At geological time scales, faults can exhibit steady creep and basins have been known to deform quite considerably. The study of fault mechanics has been widely studied and has been recently shown to play a role in affecting the behavior of fluid dynamics, namely the geometry of hydrothermal convection cells. Whilst the onset of hydrothermal convection has been extensively studied for more than a decade, little is known about the effects of mechanical deformation of faults (expressed as shear heating) on hydrothermal convection. With the need to solve for tightly coupled thermo-hydro-mechanics, we investigate these effects using a new open-source numerical multiphysics simulator, REDBACK. This simulator is specifically designed to study material instabilities in a tightly coupled manner. Using a linear stability analysis and the implementation of a pseudo-arclength continuation method, it provides the ability to compute the values of critical parameters that predict the onset of convection. This study presents the effect of shear heating on the onset of convection.
机译：在任何地质形成中，故障都在发挥重要作用，因为它们可以从不透水的密封件到流体途径。在地质时间尺度上，故障可以表现出稳定的蠕变，并且已知盆地非常大幅变形。故障力学的研究已被广泛研究，最近已显示在影响流体动力学的行为方面发挥作用，即水热对流细胞的几何形状。虽然水热对流发作已广泛研究了十多年，但关于机械变形的影响（表达为剪切加热）对水热对流的影响几乎不少。随着需要解决紧密耦合的热压机械，我们使用新的开源数字多发性模拟器，Redback来调查这些效果。该模拟器专门设计用于以紧密耦合的方式研究材料稳定性。使用线性稳定性分析和伪arclencth延续方法的实现，它提供了计算预测对流开始的关键参数值的能力。本研究提出了剪切加热对对流发作的影响。

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