数学
模板
守恒定律
赫米特多项式
磁通限制器
应用数学
不连续性分类
加权
逆风格式
非线性系统
准确度顺序
平滑度
数学分析
数值稳定性
数值分析
物理
声学
量子力学
离散化
计算科学
作者
Yousef Hashem Zahran,Amr H. Abdalla
摘要
Abstract In this article, we propose a new ninth‐order central Hermite weighted essentially nonoscillatory (HWENO) scheme, for solving hyperbolic conservation laws. The new scheme consists of the following: ninth‐order reconstruction using only five points stencil; to calculate the linear weights we used the central WENO (CWENO) technique and for nonlinear weights we used a new weighting technique. The numerical solution is advanced in time by using the ninth‐order linear strong‐stability‐preserving Runge–Kutta ( ℓ SSPRK ) scheme and for computing the numerical flux, we used the central‐upwind flux which is efficient, simple and can be used for nonconex fluxes problems. The resulting scheme is ninth order in both smooth regions and at critical points with very small numerical dissipation near discontinuities, this is due to using new smoothness indicators. Several numerical examples are presented for one‐ and two‐dimensional problems to confirm that the new scheme is superior to the other high‐order WENO schemes.
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