Reynolds number flows. Unstructured grids with flow algorithms incorporating realistic wave models. Hypersonics Design methods for hypersonic transport, reentry, and planetary exploration vehicles, where lifting efficiency is important. Bram van Leer Computational fluid dynamics, compressible flow numerical analysis, hyperbolic partial differential equations. When marching toward a steady solution to the Euler equations, it is beneficial to numerically speed up the waves by which information travels through the grid.
Artificial acceleration corresponds to a matrix preconditioning of the discretized equations.
Preconditioning also helps to make other techniques more effective.