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Title: Parallel In-Line Finite-Element Mesh Generation.

Abstract

Abstract not provided.

Authors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1148262
Report Number(s):
SAND2007-2603C
523183
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Seventh Biennial Tri-Laboratory Engineering Conference held May 7-10, 2007 in Albuquerque, NM.
Country of Publication:
United States
Language:
English

Citation Formats

Hensinger, David M. Parallel In-Line Finite-Element Mesh Generation.. United States: N. p., 2007. Web.
Hensinger, David M. Parallel In-Line Finite-Element Mesh Generation.. United States.
Hensinger, David M. Sun . "Parallel In-Line Finite-Element Mesh Generation.". United States. doi:. https://www.osti.gov/servlets/purl/1148262.
@article{osti_1148262,
title = {Parallel In-Line Finite-Element Mesh Generation.},
author = {Hensinger, David M.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}

Conference:
Other availability
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  • A general mesh topology improvement method is an efficient method for meshing, for remeshing or adaptive remeshing. It has been already presented in a previous conference. This technique, associated with a dynamical partitioning and repartitioning method can be also applied efficiently for parallel remeshing. The main application of this work will focus on forming simulation and more particularly on the forging. It involves moving mesh with moving free boundaries and contact interaction. The surface mesh as well as the volume mesh must be refined (or derefined) to fit dynamically the contact geometry which can deeply change during the whole simulation.
  • A simple method to generate and rotate 3-D finite element meshes for skewed rotor induction motors using extrusion techniques is presented. Special techniques to consider the geometrical structure of skewed rotor bars are described. With the proposed method, a change in the topology of the meshes at different rotor positions needs minor modifications only. The 3-D mesh for the rotor can thus be rotated with minimal extra computing time. Here the 2-D multi-slice mesh is used as the base-planes for extruding the 3-D mesh and the results of the 2-D multi-slice model can thus be used in the 3-D model.more » The techniques reported in this paper greatly simplifies the 3-D mesh generation, resulting in a considerable reduction in the computing time of the associated 3-D time stepping model. The generated meshes have been used successfully in constructing the 3-D time stepping finite element model for studying the electromagnetic field of induction motors.« less
  • Mesh generation has remained one of the most serious bottlenecks in solidification simulation by finite elements. In the present study, an approach using a combined extended octree/advancing front algorithm is suggested. Using this method, automatic mesh generation can easily take account of the special demands of the casting and solidification process, i.e.: fine enmeshment near material boundaries between melt and dies, rough meshes in e.g. moulds and dies. The creation of the finite element mesh for a single casting or a complete casting system is carried out in four steps. First, a solid model of the casting system is builtmore » using an arbitrary commercial solid modeler. In the second step this solid model is converted into a so-called extended octree. The third step consists of the generation of surface meshes: in each of its final octants--the so-called leaves of the octree--a mesh of triangles will be generated on the object surfaces inside the octants and on the borders of the octants. Finally, in the fourth step, an advancing front algorithm is used to create leaf by leaf a 3-dimensional mesh of tetrahedrons.« less
  • This paper focuses on the extraction of skeletons of CAD models and its applications in finite element (FE) mesh generation. The term 'skeleton of a CAD model' can be visualized as analogous to the 'skeleton of a human body'. The skeletal representations covered in this paper include medial axis transform (MAT), Voronoi diagram (VD), chordal axis transform (CAT), mid surface, digital skeletons, and disconnected skeletons. In the literature, the properties of a skeleton have been utilized in developing various algorithms for extracting skeletons. Three main approaches include: (1) the bisection method where the skeleton exists at equidistant from at leastmore » two points on boundary, (2) the grassfire propagation method in which the skeleton exists where the opposing fronts meet, and (3) the duality method where the skeleton is a dual of the object. In the last decade, the author has applied different skeletal representations in all-quad meshing, hex meshing, mid-surface meshing, mesh size function generation, defeaturing, and decomposition. A brief discussion on the related work from other researchers in the area of tri meshing, tet meshing, and anisotropic meshing is also included. This paper concludes by summarizing the strengths and weaknesses of the skeleton-based approaches in solving various geometry-centered problems in FE mesh generation. The skeletons have proved to be a great shape abstraction tool in analyzing the geometric complexity of CAD models as they are symmetric, simpler (reduced dimension), and provide local thickness information. However, skeletons generally require some cleanup, and stability and sensitivity of the skeletons should be controlled during extraction. Also, selecting a suitable application-specific skeleton and a computationally efficient method of extraction is critical.« less