Integral scale of turbulence
= Integral scale of turbulence
{title2=$\ell=\int_0^\infty f(r)\,dr$}
= Turbulent integral scale
{synonym}
= Integral scales of turbulence
{synonym}
The <integral scale of turbulence> characterizes energy-containing velocity correlations; in <isotropic turbulence> one definition is $\ell=\int_0^\infty f(r)\,dr$. Its turnover time is of order $\ell/u$. Large-scale intensity fluctuations can change the energy supplied to the <equilibrium range>.