Direct Numerical Simulation and Modeling of Turbulent Convection in Porous Media

多孔介质中的对流是日常生活中经常观察到的现象，也是工业生产中的一个重要过程。多孔介质中的湍流、自然对流和混合对流在一些新兴行业中特别重要，例如在深层盐渍含水层中长期储存二氧化碳和热能储存。然而，湍流对多孔介质中对流的影响是非常复杂的，其物理机制尚不清楚。在宏观模型中进行了显著的简化和强有力的假设，造成了相当大的模型误差。在本项目中，将用微观直接数值模拟(MIC-DNS)方法来研究多孔介质中的湍流对流。为计算多孔介质中的湍流对流提供了一种更精确的宏观模型。所开发的模型将与我们的域名系统结果进行验证。

Convection in porous media is an often observed phenomenon in everyday life and also an important process in industry as well. Turbulent natural and mixed convections in porous media are particularly important in some emerging industries, e.g., long term storage of CO2 in deep saline aquifers and thermal energy storage. However, the effect of turbulence on convection in porous media is very complicated and its physics is still not clear. Significant simplifications and strong assumptions have been made in the macroscopic models, causing considerable model errors. In the purposed project, the turbulent convection in porous media will be investigated with microscopic direct numerical simulation (MIC-DNS) methods. A more accurate macroscopic model will be developed for calculating turbulent convection in porous media. The developed model will be validated with our DNS results.