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arXiv 1912.03097math.NAcs.NA
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有界区域上迁移方程的高阶数值格式

High order numerical schemes for transport equations on bounded domains

Benjamin Boutin, Thi Hoai Thuong Nguyen, Abraham Sylla, Sébastien Tran-Tien, Jean-François Coulombel

摘要:

本文介绍了在2019年夏令营CEMRACS期间实现的NABUCO项目,该项目致力于地球物理流体和重力流。我们的目标是构造有限差分近似的输运方程与非零传入的边界数据,实现最大范数下的最佳可能的收敛速度。我们构造,实现和分析所谓的逆Lax-Wendroff程序在传入的边界。最佳的收敛速度,通过结合尖锐的稳定性估计外推边界条件与数值边界层展开。我们用Lax-Wendroff和O3方案说明了结果。

英文摘要:

This article is an account of the NABUCO project achieved during the summer camp CEMRACS 2019 devoted to geophysical fluids and gravity flows. The goal is to construct finite difference approximations of the transport equation with nonzero incoming boundary data that achieve the best possible convergence rate in the maximum norm. We construct, implement and analyze the so-called inverse Lax-Wendroff procedure at the incoming boundary. Optimal convergence rates are obtained by combining sharp stability estimates for extrapolation boundary conditions with numerical boundary layer expansions. We illustrate the results with the Lax-Wendroff and O3 schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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