This paper is a follow-up to a previous one [7] in which an algorithm to eliminate the adverse effects of small model features at the mesh level was presented. The present paper provides three additions to the original procedure. They are (i) a more efficient implementation in which those features that can be eliminated after surface mesh generation are eliminated before volume meshing, (ii) a ...

A method for decomposing a volume with a prescribed quadrilateral surface mesh, into a hexahedral-dominated mesh is proposed. With this method, known as Hex-kforphing (HMorph), an initial tetrahedral mesh is provided. Tetrahedral are transformed and combined starting from the boundary and working towards the interior of the volume. The quadrilateral faces of the hexahedra are treated as interna...

In this paper a method is presented to generate uniform hexahedral meshes automatically. In this method, a solid model with complex geometry is decomposed into swept volumes with simpler geometry. A sweepable face on the solid model is selected as the generator face to generate a swept volume. Each generator face is specified with node density and a quadrilateral mesh is generated from it. Then...

An improved algorithm for two-dimensional triangular mesh generation in arbitrary polygonally bounded domains with holes and isolated interior points is presented. The algorithm is quad-tree based and follows the ideas of Bern, Eppstein and Gilbert 1]. Using a rhomboid structure of the quad-tree and a number of new ideas for warping and centering points and for shifting grids, we are able to ge...

In this work we present a new 4D approach for reducing noise in gated SPECT perfusion images while preserving accurate cardiac motion. The method is based on motioncompensated temporal smoothing using a deformable content-adaptive mesh to model cardiac motion. We use a new, fast method for initial mesh generation. This mesh is then deformed to track cardiac motion and smoothing is performed alo...

This paper presents a method for meshing multi-material domains with additional features curves. This requirement arises for instance in situations where smooth objects (e.g. anatomical structures) are combined with technical objects (e.g. implants, surgical screws). Our approach avoids the tedious process of generating a single consistent input surface by means of an implicit representation, c...

Project co-funded by the European Commission within FP6 (2002–2006) under contract nr. IST-006413

A method for generating directionally reened unstructured tetrahedral meshes is presented. The motivation is the need to eeciently mesh the complex computational domains which are frequently encountered in aerospace applications. In this context, the method is applicable to the construction of meshes suitable for the simulation of inviscid and viscous aerodynamic ows. Minimum user intervention ...

We present a new definition of distortion and quality measures for high-order hexahedral (quadrilateral) elements. This definition leads to two direct applications. First, it can be used to check the validity and quality [1] of a high-order hexahedral (quadrilateral) mesh. Second, it allows the generation of high-order curved meshes [2, 3, 4, 5] composed of valid and high-quality hexahedral (qu...