论文标题
多尺度的三域方法，用于在包括液滴相关的界面过程中耦合自由流和流动
Multi-scale three-domain approach for coupling free flow and flow in porous media including droplet-related interface processes
论文作者
论文摘要
自由流/多孔 - 流量界面上的滴落对两个宏观流动方案之间的质量，动量和能量的交换具有很大的影响。在宏观上下文中与液滴相关的孔尺度过程进行建模，由于尺度差距，由于计算成本相对较低，因此可能会有所收获。我们开发了一种三域方法来模拟较低维界面结构域中的模型下降，生长，脱离和膜流。一种简单的上尺度技术允许计算影响耦合通量的掉落界面区域分数。在第一种情况下，仅考虑下降，生长和脱离。然后，也考虑由于横向通量而引起的扩散和合并。仿真结果表明，可以捕获这些液滴相关过程的影响。但是，更精确地表示对自由流的影响是必要的。
Drops on a free-flow/porous-medium-flow interface have a strong influence on the exchange of mass, momentum and energy between the two macroscopic flow regimes. Modeling droplet-related pore-scale processes in a macro-scale context is challenging due to the scale gap, but might be rewarding due to relatively low computational costs. We develop a three-domain approach to model drop formation, growth, detachment and film flow in a lower-dimensional interface domain. A simple upscaling technique allows to compute the drop-covered interface area fraction which affects the coupling fluxes. In a first scenario, only drop formation, growth and detachment are taken into account. Then, spreading and merging due to lateral fluxes are considered as well. The simulation results show that the impact of these droplet-related processes can be captured. However, extensions are necessary to represent the influence on the free flow more precisely.
