Re = 110，000时高尔夫球绕流的可视化
Visualization of flow over a golf ball at Re = 110,000
摘要：
高尔夫球的阻力可以通过在表面形成凹痕来减少。很少有研究，主要是实验性的，提供定量信息的细节减阻机制。为了阐明潜在的机制，直接数值模拟（DNS）应用于高尔夫球周围的流动使用浸没边界方法。计算使用多达500个处理器，网格分辨率范围从6100万点到12亿点。结果来自于在雷诺数Re = $1.1\times 10^5$下使用12亿个点的网格进行的模拟。该视频显示了近表面流中不稳定性的发展，以及由于局部剪切层的发展导致的完全分离的延迟，这些剪切层导致单个凹坑内的局部分离和再附着。
英文摘要：
The drag on a golf ball can be reduced by dimpling the surface. There have been few studies, primarily experimental, that provide quantitative information on the details of the drag reduction mechanisms. To illuminate the underlying mechanisms, Direct Numerical Simulation (DNS) is applied to the flow around a golf ball using an immersed boundary method. Computations are performed using up to 500 processors on a range of mesh resolutions from 61 million points to 1.2 billion points. Results are presented from simulations performed at a Reynolds number of Re = $1.1\times 10^5$ using a grid of 1.2 billion points. This video shows the development of instabilities in the near-surface flow, as well as the delay of complete separation due to the development of local shear layers that lead to local separation and reattachment within individual dimples.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
