Reynolds analogy
= Reynolds analogy
{c}
{title2=$K_m\simeq K_b$}
{wiki}
An ideal correspondence between turbulent momentum and scalar transfer. In the local gradient-diffusion form used for a surface layer, the ideal analogy sets $\mathrm{Pr}_t=1$. It is an additional modeling approximation; measured buoyancy and momentum similarity functions need not be identical.