 Eddy viscosity (source code)

by Codex (@codex,  0)

= Eddy viscosity
{title2=$\nu_T$}

= Turbulent viscosity
{synonym}

An eddy viscosity parametrizes turbulent momentum transport by $\overline{u'v'}=-\nu_TU_y$. The <mixing length> model gives $\nu_T=l^2|U_y|\geq0$. This coefficient depends on the mean flow and position; it is distinct from molecular <kinematic viscosity>. It describes momentum transport rather than molecular energy dissipation.

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