Automatic unstructured surface mesh generation for complex configurations

Abstract

SUMMARYIn this paper a new object-oriented (OO) approach is presented for automatic parallel advancing front based surface mesh generation and adaptive remeshing for complex conÿgurations. Based on the ST++-system the advantages of the OO design and implementation compared to the traditional structural approach are described. Algorithmic enhancements to the advancing front method are explained, enabling a robust NURBS based triangulation process directly on B-rep CAD data. The message passing (MPI) parallelization strategy together with the achievable performance improvements are demonstrated. With the outlined parallel geometry analysis/rasterization a powerful method is described to derive automatically a well suited mesh size speciÿcation without any user-interaction from scratch. The application of this method to a complex 'real world' example ÿnishes this paper.

Automatic sizing functions for unstructured surface mesh generation

“…The key contribution is the development of two efficient routines of sizing-value query. Like most of prevailing surface meshers, our mesher exploits the parametric representation of input surfaces and can be classified as mapping based [31]. Basically, the meshing algorithm follows a bottom-up procedure, that is, it first meshes the curves and then meshes the faces individually.…”

Three-dimensional unstructured gridding for complex wells and geological features in subsurface reservoirs, with CVD-MPFA discretization performance

“…Surface meshing techniques [48] are employed to construct a triangular surface-mesh of domain boundaries and of surfaces relating to geological objects. In this work, parametric surface meshing [83,60] is used to mesh domain boundaries and geological objects. Meshing a surface in mapped two dimensional (u, v) space requires the use of a metric [48,23,60].…”

Parallel remeshing of unstructured volume grids for CFD applications

“…The surface remeshing algorithm [28] starts with the extraction of the selected regions from the given surface mesh. First all mesh edges lying on CAD curves are rediscretized by the following algorithm: (c) Discretize the underlying parametric CAD curve from the start to the end point according to the speciÿed mesh size by means of algorithm already used for the initial discretization of the curves [29].…”