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(一)引言这篇评论涉及偏微分方程组数值解精度的估算(特别在流体力学领域)。文中的大多数概念并非首创,但目前对它们的认识和利用还显得不够充分。对每位使用者来说,了解一种计算方法的精度是必要的。遗憾的是,许多已发表的文章并没有提供误差估计。在另一些文章中,比较的方法没有提供使用者想得到的情况。工程界关心的流体运动问题往往是很难计算的。几乎所有的流动都是紊流。它们常常具
(A) Introduction This commentary relates to the estimation of the numerical solution of partial differential equations (especially in the field of fluid mechanics). Most of the concepts in this article are not original, but their current understanding and utilization are not enough. It is necessary for each user to understand the accuracy of a calculation method. Unfortunately, many published articles do not provide error estimates. In other articles, the comparative method did not provide what the user wanted. The fluid motion concerns of the engineering community are often difficult to calculate. Almost all the flow is turbulent. They often have