Anisotropic Delaunay Mesh Generation
نویسندگان
چکیده
Anisotropic meshes are triangulations of a given domain in the plane or in higher dimensions, with elements elongated along prescribed directions. Anisotropic triangulations are known to be well suited for interpolation of functions or solving PDEs. Assuming that the anisotropic shape requirements for mesh elements are given through a metric field varying over the domain, we propose a new approach to anisotropic mesh generation, relying on the notion of anisotropic Delaunay meshes. An anisotropic Delaunay mesh is defined as a mesh in which the star of each vertex v consists of simplices that are Delaunay for the metric associated to vertex v. This definition works in any dimension and allows to define a simple refinement algorithm. The algorithm takes as input a domain and a metric field and provides, after completion, an anisotropic mesh whose elements are shaped according to the metric field. Key-words: mesh generation, anisotropic meshes, Delaunay triangulation This research has been partially supported by the Agence Nationale de la Recherche (project GIGA). Génération de maillages de Delaunay anisotropes Résumé : Les maillages anisotropes sont des triangulations d’un domaine donné du plan ou d’un espace de plus grande dimension dont les éléments sont étirés selon des directions prescrites. Les maillages anisotropes sont utiles pour interpoler des fonctions ou résoudre des EDP. Dans cet article, nous supposons que l’anisotropie est prescrite par un champ de métrique défini sur le domaine à mailler. Nous proposons une nouvelle approche de génération de maillages anisotropes qui s’appuie sur la notion de maillage de Delaunay anisotrope. Un tel maillage est défini comme un maillage dont l’étoile de chaque sommet v est formée de simplexes qui sont de Delaunay pour la métrique de v. Cette définition est valide en toutes dimensions et un tel maillage peut être construit par un algorithme simple de raffinement. Mots-clés : Génération de maillages, maillages anisotropes, triangulation de Delaunay Maillages de Delaunay anisotropes 3
منابع مشابه
Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications
PARALLEL TWO-DIMENSIONAL UNSTRUCTURED ANISOTROPIC DELAUNAY MESH GENERATION FOR AEROSPACE APPLICATIONS Juliette Kelly Pardue Old Dominion University, 2015 Director: Dr. Andrey Chernikov A bottom-up approach to parallel anisotropic mesh generation is presented by building a mesh generator from the principles of point-insertion, triangulation, and Delaunay refinement. Applications focusing on high...
متن کاملMetric 3D Surface Mesh Generation Using Delaunay Criteria
This paper presents a technique of incorporating anisotropic metric into the Delaunay triangulation algorithm for unstructured mesh generation on 3D parametric surfaces. Both empty circumcircle and inner angles criteria of Delaunay retriangulation can be successfully used with the developed method of coordinate transformation with little adjustments. We investigate the efficiency of mesh genera...
متن کاملUnstructured Triangular - Quadrilateral Mesh Generation . Application to Surface Meshing
To start, we recall a mesh generation method, allowing to create a so called unit mesh, which is an extension of the classical Delaunay method in the case where the process is governed via an isotropic or an anisotropic control space. Then we introduce a conversion method from a triangular mesh to a quadrilateral mesh. Furthermore, we describe the generalization of this method to adaptive surfa...
متن کاملDelaunay Tetrahedralization using an Advancing-Front Approach
This paper presents a procedure for eecient generation of three-dimensional unstructured meshes of tetrahedral elements. Initially, a constrained Delaunay mesh is generated wherein internal points are created using advancing-front point placement and are inserted using a Delaunay method. The overall procedure is applied repetitively until the mesh satisses a desired element size distribution fu...
متن کاملIsolating Geometry in Mesh Programming
We discuss enhancing the generality of 2-D unstructured mesh programming by isolating some geometric dependencies so that they can be easily changed. The speciic task discussed is quality mesh generation for a 2-D man-ifold by local reenement with Delaunay insertion. The geometric dependencies that we wish to isolate are its embedded global coordinate system , including its dimension (planar or...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- SIAM J. Comput.
دوره 44 شماره
صفحات -
تاریخ انتشار 2015