Progress in Local Preconditioning of the Euler and Navier-Stokes Equations
نویسنده
چکیده
A multi-parameter family of optimal Euler preconditioners are explored. This uncovers the link between the various matrices derived by Van Leer et al. and Turkel, and also presents an attempt to derive more effective matrices. The preconditioning technique, which is based on a difference scheme rather than on partial differential equations, is extended from the Euler equations to the Navier-Stokes equations for any cell Reynolds numbers. Some numerical results demonstrate that Navier-Stokes preconditioning speeds up the calculations even for low cell Reynolds numbers.
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