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arXiv 2201.06800math.NAcs.NA
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用有限元外演算法求解div-curl问题的数值解

Numerical solution of the div-curl problem by finite element exterior calculus

Pascal Azerad, Marien-Lorenzo Hanot

摘要:

我们感兴趣的是数值重建的向量场具有规定的散度和旋度的一般域的R 3或R 2,不一定是可收缩的。为此,我们介绍了有限元外微积分的一些基本概念,并在很大程度上依赖于P. Leopardi和A.胸骨切开术组本文的目标是利用通常的向量演算和外部演算之间的联系,并显示外部演算框架的兴趣,没有太多的先验知识的主题。我们首先描述用于可收缩域的方法及其使用FeNiCS库的实现(参见fenicsproject.org)。然后,我们解决遇到的问题与非收缩域和一般边界条件,并解释如何适应的方法来处理这些情况。最后,我们给出了一些数值结果,用这种方法,在二维和三维。

英文摘要:

We are interested in the numerical reconstruction of a vector field with prescribed divergence and curl in a general domain of R 3 or R 2 , not necessarily contractible. To this aim, we introduce some basic concepts of finite element exterieur calculus and rely heavily on recent results of P. Leopardi and A. Stern. The goal of the paper is to take advantage of the links between usual vector calculus and exterior calculus and show the interest of the exterior calculus framework, without too much prior knowledge of the subject. We start by describing the method used for contractible domains and its implementation using the FEniCS library (see fenicsproject.org). We then address the problems encountered with non contractible domains and general boundary conditions and explain how to adapt the method to handle these cases. Finally we give some numerical results obtained with this method, in dimension 2 and 3.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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