arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.10206math.NAcs.NA
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一种用于对流-扩散-反应问题的完全自适应显式稳定积分器

A fully adaptive explicit stabilized integrator for advection-diffusion-reaction problems

Ibrahim Almuslimani

AI总结:

针对对流-扩散-反应方程,提出基于第二类 Chebyshev 多项式稳定化的二阶显式 RKC 方法族及可自动选择步长、级数与阻尼参数的自适应算法。

摘要:

本文介绍了一类用于对流-扩散-反应方程的新型二阶显式稳定 Runge-Kutta-Chebyshev 方法族。凭借良好的稳定性和显式可用的系数,新方法在相对较高的 Peclet 数下优于现有格式。新格式的构造基于第二类 Chebyshev 多项式的稳定化技术,该多项式最初用于随机积分器 SK-ROCK 的构造。文中提出了一种实现新格式的自适应算法,能够在每个积分步自动选择合适的步长、级数和阻尼参数。数值实验展示了新算法的效率。

英文摘要:

A novel second order family of explicit stabilized Runge-Kutta-Chebyshev methods for advection-diffusion-reaction equations is introduced. The new methods outperform existing schemes for relatively high Peclet number due to their favorable stability properties and explicitly available coefficients. The construction of the new schemes is based on stabilization using second kind Chebyshev polynomials first used in the construction of the stochastic integrator SK-ROCK. An adaptive algorithm to implement the new scheme is proposed. This algorithm is able to automatically select the suitable step size, number of stages, and damping parameter at each integration step. Numerical experiments that illustrate the efficiency of the new algorithm are presented.

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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