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• W2945178407 abstract "Abstract Modern applications of computational fluid dynamics involve complex interactions across scales such as shock interactions with turbulent structures and multiphase interfaces. Such phenomena, which occur at very small physical viscosity, require high-resolution and low-dissipation compressible flow solvers. Many recent publications have focused on the design of high-order accurate numerical schemes and provide e.g. weighted essentially non-oscillatory (WENO) stencils up to 17th order for this purpose. As shown in detail by different authors, such schemes tremendously decrease adverse effects of numerical dissipation. However, such schemes are prone to numerically induced symmetry breaking which renders validation for the targeted problem range problematic. In this paper, we show that symmetry-breaking relates to vanishing numerical viscosity and is driven systematically by algorithmic floating-point effects which are no longer hidden by numerical dissipation. We propose a systematic procedure to deal with such errors by numerical and algorithmic formulations which respect floating-point arithmetic. We show that by these procedures inherent symmetries are preserved for a broad range of test cases with high-order shock-capturing schemes in particular in the high-resolution limit for both 2D and 3D." @default.
• W2945178407 created "2019-05-29" @default.
• W2945178407 creator A5059953171 @default.
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• W2945178407 date "2019-07-01" @default.
• W2945178407 modified "2023-10-01" @default.
• W2945178407 title "Numerical symmetry-preserving techniques for low-dissipation shock-capturing schemes" @default.
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• W2945178407 doi "https://doi.org/10.1016/j.compfluid.2019.04.004" @default.
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