简介：Oscillatingflowaroundacircularcylinderinthevicinityofaplanewallwasinvestigatedbysolvingthetwo-dimensionalincompressibleNavier-StokesequationswithafiniteelementGalarkinresidualmethod.TheeffectofthegapGDbetweenthecylindersurfaceandthewallontheflowbehaviorwasstudied.ForthecaseofGD≤0.25,theperiodicityintheflowisattributedtoboththeoutershearlayerinstabilityandtheoscillatingfrequency.AsGD>0.25,vortexsheddingoccursandtheperiodicityintheflowismainlyduetothecompetitionoftheoscillatingfrequencyandthevortexsheddingfrequencyfromanisolatedstationarycylinder.

简介：现在的学习考虑发展混合被开始二条免费溪流合并形成的层由一个裂解槽盘子分开了。在粒子分散上调查旋涡的结构的影响，当时，数字模拟被进行速度比率，定义为R=U_∞-U_(-∞)/U_∞+U_(-∞),是0。5。大旋涡的模拟(LES)被采用理解大规模旋涡的结构的效果在质点分散上由theKelvin-Helmholtz不稳定性发源。有粒子的苍蝇灰缩放10，50,100，150，并且200um分别地在二维的混合层的起源被装载。Itis证实粒子分散强烈取决于大规模旋涡的结构的运动。粒子分散被在经历配对相互作用的混合的层跟随粒子轨道数字地设想。