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mixing length theory (MLT)

نگرهی ِ درازای ِ آمیزش

negare-ye derâzâ-ye âmizeš

Fr.: théorie de la longueur de mélange

A theory dealing with heat transport by → turbulence
which includes an elementary treatment of → convection.
The central idea is that an unbalanced → buoyancy
force drives a → convective cell
to move through a distance, called the → mixing length,
before the cell dissolves and joins the ambient medium.
In this theory an adjustable → mixing length parameter
α is used. The theory, originally due to L. Prandtl (1925), was first applied to the Sun by
L. Biermann (1932, Z. Astrophys. 5, 117).