论文标题
改进的数学模型，用于在具有障碍物的盖子驱动腔中沉降微塑料颗粒
An improved mathematical model for the sedimentation of microplastic particles in a lid-driven cavity with obstacle
论文作者
论文摘要
在本文中，我们开发了一个数学模型，用于在盖子驱动的腔流中小颗粒的沉积过程，该过程具有模拟河流中微塑料颗粒的运输的障碍。在中等雷诺数的固定不可压缩的Navier-Stokes模拟提供了背景流场。将球形颗粒注入该流场，并求解它们的运动方程式以确定障碍物表面沉积物的颗粒数量。为了捕获典型的生物生物和生物膜对河床底部表面的影响，障碍物可以在颗粒上施加吸引力。进行了各种模拟和参数研究，以确定障碍物几何形状，粒子密度和吸引力对沉积过程的影响。
In this paper, we developed a mathematical model for the sedimentation process of small particles in a lid-driven cavity flow with an obstacle to model the transport of microplastic particles in rivers. A stationary incompressible Navier-Stokes simulation at moderate Reynolds-numbers provides the background flow field. Spherical particles are injected into this flow field and their equation of motion is solved to determine the number of particles that sediment on the surface of the obstacle. To capture the effect of typical biological organisms and biofilms on the bottom surface of river beds, the obstacle can exert an attraction force onto the particles. Various simulations and parameter studies are carried out to determine the influence of the obstacle geometry, particle densities, and the attraction force on the sedimentation process.
