Arbitrary Lagrangian Eulerian
From The Encyclopedia of Earth
March 8, 2010, 12:00 am
June 28, 2012, 5:26 am
Arbitrary Lagrangian Eulerian (ALE), in the field of computational fluid dynamics, is a finite element solution technique for fluid flow problems with moving interfaces, e.g. moving walls, free surfaces. In the ALE method, the newly updated free surface is determined purely via the Lagrangian method, i.e. by the velocities of the fluid particles at the free surface. The nodes in the interior of the domain are displaced in an arbitrarily prescribed way to obtain a mesh of proper shape and to avoid mesh crossing.
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