Kolmogorov length scale

Short definition of Kolmogorov length scale (Kolmogorov length scale)
Kolmogorov length scale $\eta$

This is the common definition for Kolmogorov length scale, but other definitions maybe discussed within the wiki.

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$\eta ={\left(\frac{{\nu }^3}{\epsilon }\right)}^{1/4}$ where $\nu$ is the kinematic viscosity of the fluid and $\epsilon$ is the rate of dissipation of turbulence kinetic energy by viscous friction. It is the smallest length scale before viscous effects smoothen the velocity fluctuations.