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The Kolmogorov micro scales are formed using the dissipation rate per unit mass and the Kinematic viscosity ν .
Length scale,
Time scale,
Velocity scale,
We define as Reynolds number
where velocity scale, L integral length scale and λ Taylor microscale
Let us estimate Kolmogorov's length scale
Imagine a channel flow
![](images/Graphic1.gif)
Figure 5.1
Assume Isotropy, i.e., ![](images/image035.gif)
Kolmogorov Length Scale
Let us take
U = 10 m/s, D =1m,
Re = 6.5 × 10 5 , Tu = 0.2 |
![](images/image052.gif)
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= 0.38mm |
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