旋转系统中沉没圆柱体后的涡流

IF 1.7 4区计算机科学 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Journal of Visualization Pub Date : 2024-01-10 DOI:10.1007/s12650-023-00954-y

Yoshinori Mizuno, Toshimasa Yagi, Kazuyasu Mori

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引用次数: 0

摘要

我们通过实验研究了在明渠中以恒定角速度绕垂直轴旋转的浸没垂直圆柱体后面的尾流。我们通过粒子图像测速仪测量获得了流体自由表面的二维速度场。在某些情况下，我们发现出现了垂直于表面的稳定漩涡，并在其后面出现了漩涡鞘。出现这种漩涡的必要条件是罗斯比数低于临界值，临界值由圆柱体的相对高度决定。雷诺数必须足够大，临界值取决于相对高度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Vortices behind a submerged cylinder in a rotating system

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Vortices behind a submerged cylinder in a rotating system

We experimentally studied the wake flow behind a submerged vertical cylinder in an open channel rotating at a constant angular velocity around a vertical axis. We obtained the two-dimensional velocity field on the free surface of fluid by a Particle Image Velocimetry measurement. In some cases, we found the emergence of a steady vortex perpendicular to the surface and vortex-shedding behind it. The necessary condition for the emergence of such vortices is given by the excess of Rossby number below a critical value, which is determined by the relative height of the cylinder. Reynolds number must be large enough, and the thresholding value depends on the relative height.

Graphical abstract

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来源期刊

Journal of Visualization COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS-IMAGING SCIENCE & PHOTOGRAPHIC TECHNOLOGY

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： Visualization is an interdisciplinary imaging science devoted to making the invisible visible through the techniques of experimental visualization and computer-aided visualization. The scope of the Journal is to provide a place to exchange information on the latest visualization technology and its application by the presentation of latest papers of both researchers and technicians.