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Coefficient datasets for high-order, stable, and conservative boundary schemes for central and compact finite differences

机译:中心和紧凑有限差分的高阶,稳定和保守边界方案的系数数据集

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Stable and conservative numerical boundary schemes, for both compact and explicit (central) finite differences require a number of parameters that must be tuned for stability. Values of these coefficients for 4th, 6th, and 8th boundary schemes are given in this article. The stability of the schemes is demonstrated through a series of numerical tests in “High-Order, Stable, and Conservative Boundary Schemes for Central and Compact Finite Differences” Brady and Livescu, 2019. These tests include: a neutrally stable constant coefficient hyperbolic system, a two-dimensional varying coefficient hyperbolic scalar equation and, examining the transport of an inviscid vortex using the compressible Euler equations. The error norms for the variety of tests associated with different the schemes for different grid resolutions and time-step constraints are given in the accompanying databases.
机译:对于紧凑型和显式(中心)有限差分而言,稳定且保守的数值边界方案需要为稳定而必须调整的许多参数。本文给出了第4,第6和第8边界方案的这些系数的值。该方案的稳定性通过一系列数值测试在Brady和Livescu的“中央和紧凑有限差分的高阶,稳定和保守边界方案”(2019年,布雷迪和利文斯库)中进行了证明。这些测试包括:中性稳定的常系数双曲系统,二维变系数双曲标量方程,并使用可压缩的欧拉方程检查不粘涡的传输。在随附的数据库中,给出了与针对不同网格分辨率和时间步长约束的不同方案相关的各种测试的错误规范。

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