Visualization of steady streaming near oscillating spheroids
Visualization of steady streaming near oscillating spheroids
复制标题
振荡球体附近稳定流的可视化
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
P. Rogers
中科院分区：
文献类型：
--
作者：
Charlotte Kotas;M. Yoda;P. Rogers
本文对不同长宽比的椭球在粘性流体中沿其对称轴振动的定常流动进行了实验研究，雷诺数达150，归一化振荡幅度达1.2。使用沿椭球体中心平面的锁相粒子路径线图像来可视化流动的稳定流动分量。流动内部区域的范围，以到停滞点的距离为特征，似乎取决于基于椭球体纵横比和等效半径的长度尺度。椭球体也以相对于其对称轴的非零角摆动。斜振球表面驻点的角位移与长径比和振动角有关。
Experimental studies of steady streaming flows are presented for spheroids of various aspect ratios oscillating in a viscous fluid along their axis of symmetry at Reynolds numbers up to 150 and normalized oscillation amplitudes up to 1.2. The steady streaming component of the flow is visualized using phase-locked particle pathline images along the central plane of the spheroid. The extent of the inner region of the flow, characterized by the distance to the stagnation points, appears to depend on a length scale based on the spheroid aspect ratio and equivalent radius. Spheroids were also oscillated at a nonzero angle with respect to their axis of symmetry. The angular displacement of the stagnation points on the surface of these obliquely oscillated spheroids is related to the aspect ratio and the angle of oscillation.