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- W2330778937 abstract "A novel high-order method combining unstructured flux correction along body surfaces and high-order finite differences normal to surfaces is formulated for unsteady viscous flows on strand grids. The flux correction algorithm is applied in each unstructured layer of the strand grid, and the layers are then coupled together via a source term containing derivatives in the strand direction. Strand-direction derivatives are approximated to high-order via summation-by-parts operators for first derivatives and second derivatives with variable coefficients. We show how this procedure allows for the proper truncation error canceling properties required for the flux correction scheme. The resulting scheme possesses third-order design accuracy, but often exhibits fourth-order accuracy when higher-order derivatives are employed in the strand direction, especially for highly viscous flows. We prove discrete conservation for the new scheme and time stability in the absence of the flux correction terms. Results in two dimensions are presented that demonstrate improvements in accuracy with minimal computational and algorithmic overhead over traditional second-order algorithms." @default.
- W2330778937 created "2016-06-24" @default.
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- W2330778937 creator A5071544487 @default.
- W2330778937 date "2014-01-10" @default.
- W2330778937 modified "2023-09-27" @default.
- W2330778937 title "High-Order Flux Correction/Finite Difference Schemes for Strand Grids" @default.
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- W2330778937 doi "https://doi.org/10.2514/6.2014-0937" @default.
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