Velocity-vorticity patterns in turbulent flow.
Velocity-vorticity patterns in turbulent flow.
复制标题
DOI：
10.1103/physrevlett.54.2505
复制
发表时间：
1985-06
影响因子：
8.6
通讯作者：
Pelz;Yakhot;Orszag;Shtilman;Levich
中科院分区：
文献类型：
--
作者：
Pelz;Yakhot;Orszag;Shtilman;Levich
本文用Navier-Stokes方程的直接数值模拟方法研究了平面Poillille（槽道）涡和Taylor-Green涡流动中的局部螺旋度波动。结果表明，在高耗散的区域，速度和涡度之间的夹角的余弦是均匀分布的;在低耗散的区域，速度和涡度矢量有对齐的趋势。它还表明，在通道的中心部分附近，速度和涡度矢量有很强的倾向，对齐，而在缓冲区，所有的角度几乎是同样的可能性。
Direct numerical simulation of the Navier-Stokes equations is used for the investigation of local helicity fluctuations in plane Poiseuille (channel) and Taylor-Green vortex flows. It is shown that in regions of high dissipation, the cosine of the angle between velocity and vorticity is evenly distributed; in regions of low dissipation, the velocity and vorticity vectors have a tendency to align. It is also shown that near the central part of the channel, velocity and vorticity vectors have a strong tendency to be aligned, while in the buffer region, all angles are nearly equally probable.