An Extension of the Reliable Whisker Weaving Algorithm.

In many FEM applications, hexahedral meshes are necessary to get the best results. However the automatic generation of an hexahedral mesh from an arbitrary 3D geometry still remains a challenge. In this paper, we propose an extension of the reliable Whisker Weaving algorithm [6]. The Whisker Weaving algorithm starts from a pre-meshed quadrilateral surface, it generates hexahedral meshes for a large spectrum of 3D geometries successfully, but it often creates poor-shaped hex elements. We show that considering geometric information in the shrinking loop selection process can provide better results. We introduce criteria to handle non-convex geometries, parallel loops and sheets bounded by several loops.