双曲守恒律计算时间长的自适应对称通量限制器

IF 1.4 Q2 MATHEMATICS, APPLIED Results in Applied Mathematics Pub Date : 2023-11-01 DOI:10.1016/j.rinam.2023.100410
Shujiang Tang
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引用次数: 0

摘要

在传统的全变差递减(TVD)方案中,限制器的构造是一个关键因素。在经典的限制器中,超级蜜蜂的数值耗散最小,但如果计算时间延长,它会导致光滑区域的过度压缩和不连续点和临界点的过度人工变陡。Minmod, van Leer, van Albada和MC等经典限制器无法区分不同的波类型,它们甚至会导致计算时间延长的多临界值问题的数值振荡。将经典限制器与超级蜜蜂相结合,创造了一类自适应限制器。该自适应限幅器可以在平滑区域达到二阶精度,有效地减少了计算时间过长的过度压缩和过度的人工陡坡。分析和数值结果表明,带自适应限制器的MUSCL方案是有效的。
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Adaptive symmetric flux limiters with long computation times for hyperbolic conservation laws

The construction of the limiter is a critical factor in the traditional Total Variation Diminishing (TVD) scheme. Among the classical limiters, superbee has the lowest numerical dissipation, but it can lead to over-compression in smooth regions and excessive artificial steepening at discontinuities and critical points if the computation time is prolonged. Classical limiters like Minmod, van Leer, van Albada, and MC fail to distinguish between different wave types, and they can even cause numerical oscillations for multi-critical value problems with prolonged computation times. A class of adaptive limiters has been created by combining classical limiters with superbee. This adaptive limiter can achieve second-order accuracy in smoothed regions and effectively reduce over-compression and excessive artificial steepening for long computation times. Analytical and numerical results show that the MUSCL scheme with an adaptive limiter is efficient.

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来源期刊
Results in Applied Mathematics
Results in Applied Mathematics Mathematics-Applied Mathematics
CiteScore
3.20
自引率
10.00%
发文量
50
审稿时长
23 days
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