涡脱落街可视化

由 Strouhal 数用动态圆柱尾流显示涡脱落频率、周期和涡间距。

visual calculator气动与外流

先看流动形态，再相信数字。

该工具把 CFD 设置转换为工况、尺度和主导效应提示。调节下方计算器，观察动态图与计算结果如何一起变化。

输入尺度

模型

判断

Strouhalvortex sheddingwakevisualization

公式

KaTeX rendered

\begin{aligned}\text{f = St U / D}\\[0.35em]\text{lambda = U / f = D / St}\end{aligned}

ASCII source

f = St U / D, lambda = U / f = D / St

StU (m/s)D (m)rho (kg/m^3)mu (Pa*s)

shedding frequency (Hz)

37.5000

period (s)

0.0267

vortex spacing (m)

0.4000

Re_D

8.167e+4

wake class

Karman street

0.2000

D / lambda

0.2000

U / f

0.4000

Cylinder wakes often sit near St = 0.2 over a broad subcritical Reynolds range, but real Strouhal varies with geometry and regime.