论文标题
在受限血管中静态流体中粒子簇定居和扩散的普遍行为
Universal Behaviour of Settling and spreading of particle clusters in quiescent fluids in confined vessels
论文作者
论文摘要
在这里，我们报告了关于容器中包含的静态流体中高雷诺数粒子簇沉降的实验。观察到颗粒以近圆形的形状沉淀，无论容器横截面以及颗粒形状，大小和类型的形状如何。研究了不同参数的影响，例如颗粒的质量，类型和纵横比，高度和液体粘度。发现撞击血管底部表面时弹起的簇的半球底盖的形成是造成沉降结构的最终圆形形状的原因。从簇中看到粒子泄漏以尾巴的形式。在粘度超过100 cp的液体中，观察到簇断裂，导致最终沉降颗粒的沉降和不对称形状受到阻碍。这些观察结果可用于了解可以观察到此类集群沉降的整体区域。
Here we report experiments on particle cluster settling at high Reynolds number in quiescent fluid contained in a vessel. The particles were observed to settle in a near-circular shape irrespective of the shape of the vessel cross-section and particle shape, size, and types. Effect of different parameters such as mass, type and aspect ratio of the particles, height, and viscosity of liquid was investigated. Formation of the hemispherical bottom cap of the cluster that bounces upon hitting the vessel bottom surface was found to be responsible for the final circular shape of the settled structure. Particle leakage from the cluster was seen in the form of a tail. In the liquid having viscosity beyond 100 cP, cluster breakage was observed that resulted in hindered settling and asymmetric shapes of finally settled particles. The observations are useful to understand the overall area over which settling of such clusters can be observed.
