ISOGEOMETRIC DISCRETE DIFFERENTIAL FORMS IN THREE DIMENSIONS

被引：142

作者：

Buffa, A. ^{[1
]}

Rivas, J. ^{[2
]}

Sangalli, G. ^{[3
]}

Vazquez, R. ^{[1
]}

机构：

[1] CNR, Ist Matemat Applicata & Tecnol Informat, I-27100 Pavia, Italy

[2] Univ Basque Country, Dept Matemat, Leioa 48940, Spain

[3] Univ Pavia, Dipartimento Matemat, I-27100 Pavia, Italy

来源：

SIAM JOURNAL ON NUMERICAL ANALYSIS | 2011年 / 49卷 / 02期

基金：

欧洲研究理事会;

关键词：

isogeometric analysis; differential forms; Maxwell equations; ELEMENT EXTERIOR CALCULUS; FINITE-ELEMENTS; MAXWELL EQUATIONS; APPROXIMATION; REFINEMENT; STABILITY; SPLINES; VERSION; NURBS;

D O I：

10.1137/100786708

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

The concept of isogeometric analysis (IGA) was first applied to the approximation of Maxwell equations in [A. Buffa, G. Sangalli, and R. Vazquez, Comput. Methods Appl. Mech. Engrg., 199 (2010), pp. 1143-1152]. The method is based on the construction of suitable B-spline spaces such that they verify a De Rham diagram. Its main advantages are that the geometry is described exactly with few elements, and the computed solutions are smoother than those provided by finite elements. In this paper we develop the theoretical background to the approximation of vector fields in IGA. The key point of our analysis is the definition of suitable projectors that render the diagram commutative. The theory is then applied to the numerical approximation of Maxwell source problems and eigenproblems, and numerical results showing the good behavior of the scheme are also presented.

引用

页码：818 / 844

页数：27

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