基于第五顺序非线性多顺序权衡方法的Z权重函数的改进,用于捕获超标保存定律的冲击
Jinwei Bai1, Zhenguo Yan2, Meiliang Mao1
1Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China.
Entropy (Basel, Switzerland)
|April 26, 2024
概括
一种用于冲击捕获的新型非线性加权方法提高了接近不连续性的精度和分辨率. 这种自适应的5-3-3-3模板方案避免了振荡,并提高了超标性保存规律的性能.
科学领域:
- 计算流体动力学的流体动力学.
- 数字分析 数字分析
- 应用数学 应用数学 应用数学
背景情况:
- 准确的冲击捕获对于模拟流体动力学现象至关重要.
- 像JS和Z权重这样的现有方法在解决不连续性方面存在局限性.
- 开发适应性,高分辨率的方案是一个持续的挑战.
研究的目的:
- 提出一种用于冲击捕获的新型非线性多顺序加权方法.
- 为了适应5-3-3-3模板的方法.
- 为了提高分辨率和减少不连续性附近的振荡.
主要方法:
- 一种非线性多顺序加权方法,基于5点和3点笔.
- 一个修改后的光滑度指标,用于5点笔,具有更高阶的领先项.
- 可调节的线性权重来控制准确性和不连续性捕获能力.
主要成果:
- 拟议的方法表明没有明显的在不连续性附近的振荡.
- 与Z加权相比,不连续和光滑区域的分辨率得到了改进.
- 该方案在平滑区域保持准确性,同时增强不连续性捕获.
结论:
- 新的非线性加权方法为冲击捕获提供了卓越的性能.
- 适应式模板方法有效地处理复杂的流体流动特征.
- 这种方法提供了一个有价值的工具,用于数值模拟的形保存定律.
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