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

Figure 5.1

Assume Isotropy, i.e.,

~ ~

Kolmogorov Length Scale

~

Let us take

= 0.38mm