变系数双曲电报型方程的Rothe-Chebyshev配置算法

IF 5.9 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
Mohammad Izadi , Samad Noeiaghdam , H.M. Ahmed
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引用次数: 0

摘要

构造了具有Dirichlet或Neumann边界条件的二阶电报型方程的半离散谱方法。首先采用Rothe逐次法进行时间离散化,将模型方程转化为一个边值问题系统。随后,对空间变量利用移位修正切比雪夫多项式(SMCPs)建立了谱矩阵过程。证明了由混合Rothe-SMCPs算法得到的离散解族对O阶(Δτ+R−3)的连续解具有一致收敛性。在这种情况下,Δτ表示时间步长,而R表示在近似过程中使用的smcp的数量。模拟实验表明,数值结果与理论预测吻合较好。与现有研究工作中可用的计算值相比,采用较大时间步长的数值结果显示出更高的精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Rothe-Chebyshev collocation algorithm for the hyperbolic telegraphic type equations with variable coefficients
We construct a semi-discretized spectral approach for the second-order telegraphic-type equations with Dirichlet or Neumann boundary conditions. The successive method of Rothe is first employed for the temporal discretization procedure to transform the model equations into a system of boundary value problems. Subsequently, the spectral matrix procedure utilizing the shifted modified Chebyshev polynomials (SMCPs) is formulated for the spatial variable. The family of discrete solutions obtained by the hybrid Rothe-SMCPs algorithm is demonstrated to exhibit uniform convergence to the continuous solution of order O(Δτ+R3). In this context, Δτ signifies the time step, while R represents the number of SMCPs employed in the approximation procedure. Simulation experiments are carried out to highlight the strong agreement between the numerical results and theoretical predictions. The numerical results utilizing a larger time-step size exhibit greater accuracy compared to the computational values available in existing research works.
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来源期刊
Ain Shams Engineering Journal
Ain Shams Engineering Journal Engineering-General Engineering
CiteScore
10.80
自引率
13.30%
发文量
441
审稿时长
49 weeks
期刊介绍: in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.
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