Test of the stability of two-dimensional Taylor-Couette flow

二维Taylor-Couette流稳定性检验

• 批准号: 19K14895
• 负责人: Cerbus Rory
• 金额: $ 1.66万
• 依托单位: Okinawa Institute of Science and Technology Graduate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2019
• 资助国家: 日本
• 起止时间: 2019-04-01 至 2020-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-19K14895/
• 关键词: 乱流遷移; ２次元乱流; Turbulence Transition; 2D turbulence

The principal investigator has placed this project on temporary hold due to leaving for a temporary position abroad. Up until that time, a number of different 2D Couette geometries were constructed, to be able to explore a wide range of Reynolds numbers (equivalently, Taylor numbers) to test for stability of the flow. In addition to smooth walls, rough walls were also constructed. For the smooth cases tested, the flow is stable. In addition, experiments (soap film) and simulations (OpenFOAM) of 2D channel flow were performed to investigate the stability of that flow and to compare with the 3D case. As observed in other studies, a peculiar traveling wave, reminiscent of a snake, emerges. The Reynolds number dependence of the wavelength was investigated experimentally and numerically.

首席调查员由于离开国外临时职位而将该项目置于临时持有。直到那段时间，构建了许多不同的2D COUETTE几何形状，以探索广泛的雷诺数（等效地，泰勒号），以测试流量的稳定性。除了光滑的墙壁外，还建造了粗糙的墙。对于测试的平滑病例，流量是稳定的。此外，进行了2D通道流的实验（肥皂膜）和模拟（OpenFOAM），以研究该流量的稳定性并与3D情况进行比较。正如其他研究中观察到的那样，出现了一个奇特的行进波，让人联想起蛇。通过实验和数值研究了波长的雷诺数依赖性。