# Large eddy model

From AMS Glossary

## large eddy model

A numerical model with an averaging volume sufficiently small that the eddies contained entirely within it (i.e., the unresolved eddies) are of inertial-range scales and smaller.

The larger energy-containing eddies are resolved explicitly away from the boundaries. In the boundary layer the energy-containing eddies are not resolved near the surface and near the inversion at the top. In these regions a subgrid-scale parameterization is needed.

Wyngaard, J. C. 1982. Atmospheric Turbulence and Air Pollution Modelling. Nieuwstadt and van Dop, Eds., Reidel, . 97–100.