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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Introducing an experimental split-cylinder to study flows with geophysical interest: First steps and first results
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Introducing an experimental split-cylinder to study flows with geophysical interest: First steps and first results

机译：APS-流体动力学APS部门第70届年会-事件-引入一个实验性的分体圆柱体来研究对地球物理感兴趣的流动：第一步和初步结果

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A new experimental setup has been developed in order to study rotating flows. Our research is derived from the experiments carried out in our group relating to this kind of flows, and the setup is inspired by the simulations performed by Lopez & Gutierrez-Castillo [JFM 800, 666--687, 2016] using a split-cylinder flow. In their work they study the different bifurcations taking place into the flow, among others, finding inertial waves in different configurations of the movement of the split-cylinder.Our setup consists in a split-cylinder in which each half can move in co-rotation or in counter-rotation. Moreover, we can set the rotation velocity of each half independently in order to study these different configurations of the flow. The aspect ratio defined as $Gamma=H/R$ can be modified, where $H$ is the internal length of the cylinder and $R$ is its radius.With this setup, we study the flow developed inside the split-cylinder depending on the Reynolds number like the different symmetry-breaking that should appear according to Lopez & Gutierrez-Castillo. To obtain the experimental data we use both laser Doppler velocimetry (LDV) and particle image velocimetry (PIV) techniques. The firsts results got are in the co-rotation case rotating one half faster than the other.
机译：为了研究旋转流，已经开发了一种新的实验装置。我们的研究来自小组中与此类流动有关的实验，该装置的灵感来自Lopez＆Gutierrez-Castillo [JFM 800，666--687，2016]使用分体式油缸的模拟流。在他们的工作中，他们研究了在流动中发生的不同分叉，其中包括在分体式气缸运动的不同配置中找到惯性波。我们的设置包括一个分体式气缸，其中每个半部都可以共同旋转或反向旋转。此外，我们可以独立设置每个半部的旋转速度，以便研究这些不同的流动配置。可以修改定义为$ Gamma = H / R $的宽高比，其中$ H $是圆柱体的内部长度，$ R $是其半径。根据洛佩兹和古铁雷斯-卡斯蒂略的观点，在雷诺数上出现了不同的对称性破坏。为了获得实验数据，我们同时使用了激光多普勒测速（LDV）和粒子图像测速（PIV）技术。获得第一名的结果是在同向旋转情况下，旋转速度比另一旋转速度快了一半。

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