Experimental studies of turbulence transitions and transport processes in turbulent Taylor-Couette flow

泰勒-库埃特湍流中湍流转变和传输过程的实验研究

• 批准号: 153990664
• 负责人: Professor Dr.-Ing. Christoph Egbers
• 金额: --
• 依托单位: Institute of Science and Technology Austria
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/153990664?language=en
• 关键词: Experimental; studies; turbulence; transitions; transport

The flow in the gap between two concentric cylinders rotating relative to each other is known as Taylor-Couette (TC) flow. This topic is highlighted in understanding of much hydrodynamic instabilities. Depending on the rotation rate of the two cylinders, one can achieve either a linear stable regime (as in pipe flow) or an unstable regime (as in Rayleigh-Bénard convection). So, the Taylor-Couette-system represents for the Research Unit the link of the linear stability between the pipe- and the Rayleigh-Bénard-flows. Besides its relevance for a lot of applications in technology, the Taylor-Couette flow is also of fundamental interest in terms of transport properties in rotating systems, as Earth's atmosphere or accretion disks. A better understanding of the transport processes and the turbulent structures, a uniform description of these complex aspects - there are tasks of great importance for many domains.

在相互相对旋转的两个同心圆柱体之间的间隙中的流动被称为泰勒-库埃特流。这个主题在理解许多水动力不稳定性方面是突出的。根据两个圆柱体的旋转速率，可以实现线性稳定状态（如在管道流动中）或不稳定状态（如在瑞利-巴姆纳德对流中）。因此，泰勒-库埃特系统为研究单位代表了管道流和瑞利-巴姆纳德流之间线性稳定性的联系。除了与许多技术应用相关外，Taylor-Couette流在旋转系统（如地球大气或吸积盘）的输运特性方面也具有基本的兴趣。更好地理解输运过程和湍流结构，统一地描述这些复杂的方面，对许多领域来说都是非常重要的任务。