The numerical viscosity of entropy stable schemes for systems of conservation laws. I

1987/01/01 by Eitan Tadmor · 19 citations
Engineering · Mathematics · #Computational Fluid Dynamics and Aerodynamics #Fluid Dynamics and Turbulent Flows #Navier-Stokes equation solutions

paper · pdf · doi:10.1090/s0025-5718-1987-0890255-3

Abstract

Discrete approximations to hyperbolic systems of conservation laws are studied. We quantify the amount of numerical viscosity present in such schemes, and relate it to their entropy stability by means of <italic>comparison</italic> . To this end, conservative schemes which are also entropy conservative are constructed. These <italic>entropy conservative</italic> schemes enjoy second-order accuracy; moreover, they can be interpreted as piecewise linear finite element methods, and hence can be formulated on various mesh configurations. We then show that conservative schemes are entropy stable, if and—for three-point schemes—only if they contain <italic>more</italic> viscosity than that present in the above-mentioned entropy conservative ones.

Citations

• Hyperbolic systems of conservation laws II
• Numerical viscosity and the entropy condition for conservative difference schemes

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