报告题目: Three-dimensional effects in bluff body wake flows

时间：2023年7月31日 10:00-11:30

地点：轮机楼317

内容摘要：Flow past bluff bodies is one of the most classic research topics in fluid mechanics, which is of great interest for a wide range of engineering applications. In subsea engineering, many bluff bodies have an infinite long span and are regarded as nominally two-dimensional (2D). Therefore, 2D simulations were usually carried out to obtain the forces acting on the bodies to reduce the computational cost. However, at high Reynolds numbers, three-dimensional (3D) effects can have significant influence on the hydrodynamic quantities. Some simple geometries of the bluff body will also induce highly 3D wake flow. This presentation will discuss how are the 3D coherent structures in the wake flow related to the drag coefficients and where the large discrepancies between the hydrodynamic forces using 2D and 3D simulations originate. The spatial length scales of 3D flow structures and the Reynolds number effects will be also investigated.

报告人简介：

尹光博士于2013年本科毕业于清华大学航天航空学院钱学森力学班，并于2018年在清华大学航天航空学院获得力学博士学位，博士研究方向为近壁湍流及其建模。博士毕业后，在挪威斯塔万格大学机械与结构工程以及材料科学系海洋工程方向担任研究员，主要研究领域为管线冲刷和海洋水动力分析及其应用研究。目前，在Ocean Engineering、Coastal Engineering、Applied Ocean Research、Journal of Fluid Mechanics、Physics of Fluids等国际权威学术期刊上发表论文20余篇，指导博士生1名和硕士生11名。