AMLT - Anisotropic mixing length theory

Abstract

The standard mixing length theory (MLT) assumes that the largest eddies are the only ones that contribute to convection and that they are isotropic. These two requirements are internally inconsistent since it is experimentally known that only small eddies are isotropic while large ones exhibit large degrees of anisotropy. A new model called anisotropic MLT (AMLT) is presented here, together with a model that relates the anisotropy to other quantities of the problem. The new AMLT equations are solved for two cases of stellar structure calculations.