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流体力学拉氏程序收敛性及数值计算不确定度初探 被引量:6

Asymptotic Convergence Analysis and Quantification of Uncertainty in Lagrangian Computations
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摘要 将欧氏(Eulerian)数值模拟不确定度分析的基本概念和方法引进拉氏(Lagrangian)计算中,包括渐近收敛阶、渐近收敛域、网格收敛指标(Grid convergence index,GCI)等.给出GCI方法刻画数值计算不确定度的具体步骤.并应用于N-R格式,验证了方法的有效性. We introduce asymptotic order of convergence,asymptotic range of convergence and concepts under behavior of Lagrangian computations.We also introduce grid convergence index to Lagrangian computation,and give a program using GCI method.These concepts and methods are used to measure computed values away from numerical asymptotic values.
出处 《计算物理》 CSCD 北大核心 2013年第3期346-352,共7页 Chinese Journal of Computational Physics
基金 国家自然科学基金(11072039) 中物院联合基金(11076015) 中物院科学基金(2011B0202043)资助项目
关键词 流体力学拉氏计算 渐近收敛性分析 网格收敛指标 hydrodynamics code asymptotic convergence analysis grid convergence index.
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