In the present study, we use direct numerical simulation to investigate the density-driven convection in a two-dimensional anisotropic heterogeneous porous media associated with significant laminated formation. At first, the heterogeneous porous media are randomly generated to represent laminated structure, in which the horizontal correlation length of permeability field is much longer than the vertical counterpart. Then, a highly accurate pseudo-spectral method and compact finite difference scheme with higher order of accuracy are employed to numerically reproduce the convection flow in the laminated porous media. The results show that the laminated structures restrict interactions among the downward plumes of heavier fluid. The plumes tend to descend more straightly in a laminated porous medium associated with a slower growth rate. As a result, the laminated distribution of permeability is considered having an inhibiting effect on the convection flow.

在本研究中，我们使用直接数值模拟来研究二维各向异性异质多孔介质中密度驱动的对流，该介质与明显的层状形成有关。首先，随机生成非均质多孔介质来代表层状结构，其中渗透率场的水平相关长度比垂直方向的渗透长度长得多。然后，采用高精度伪谱方法和具有较高精度的紧凑有限差分方案来数值模拟层状多孔介质中的对流。结果表明，层状结构限制了较重流体向下羽流之间的相互作用。羽流倾向于在层压多孔介质中更笔直地下降，这与较慢的生长速度有关。结果是，