The circular cylinder in simple shear at moderate Reynolds numbers: An experimental study
The circular cylinder in simple shear at moderate Reynolds numbers: An experimental study
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DOI：
10.1007/s003480000206
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发表时间：
2001-03
影响因子：
2.4
通讯作者：
C. M. Zettner;M. Yoda
中科院分区：
文献类型：
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作者：
C. M. Zettner;M. Yoda
使用粒子图像测速技术研究了简单剪切下中性浮力圆柱体周围的流动。给出了无扭矩缸和固定缸在基于剪切的雷诺数在 8 到 25 之间、两种不同的流动限制值下的稳定实验结果。据我们所知，这些数据是该雷诺数范围的第一个实验结果，表明归一化旋转速率随雷诺数的衰减比先前对无侧限流的理论预测慢得多，并且随着限制的增加，衰减率降低。提出了一个新的简单模型来解释这些影响。考虑到稳态和无侧限流动实验和模拟的物理和技术限制，简单剪切中约束对圆柱体的影响值得进一步研究。
The flow around a neutrally buoyant circular cylinder in simple shear was studied using particle-image velocimetry. Steady experimental results are presented for both torque-free and fixed cylinders at shear-based Reynolds numbers between 8 and 25 at two different flow confinement values. These data, which are to our knowledge the first experimental results for this Reynolds number range, show that the normalized rotation rate decays much more slowly with Reynolds number than previous theoretical predictions for unconfined flow, with the rate of decay decreasing as confinement increases. A new simple model is proposed to explain these effects. Given physical and technological limitations upon steady and unconfined flow experiments and simulations, the effect of confinement on a cylinder in simple shear merits further study.