نتایج جستجو برای: adaptive mesh refinement
تعداد نتایج: 266891 فیلتر نتایج به سال:
An adaptive mesh refinement (AMR) method based on discretization matrix metric is described. The computational algorithm is implemented using OpenFOAM parallel library. This open C++ library provides data structures and routines to work with the finite volume method and adaptive mesh. The method was used for oil flow in final drive simulation. For more efficient use of computing resources, we d...
All Rights Reserved 2000 ii For my parents iv Acknowledgements I am very grateful to my advisor, Professor Jonathan Goodman, who did a great job in helping me to find a lot of directions (including directions for mesh refinement, financial help, job). It has been a very enjoyable experience to work and learn from Jonathan. Thanks to Professor Olof Widlund for his useful suggestions on this work...
An adaptive mesh refinement procedure for wrinkling prediction analyses is presented. First the critical values are determined using Hutchinson’s bifurcation functional. A wrinkling risk factor is then defined and used to determined areas of potential wrinkling risk. Finally, a mesh refinement is operated.
On an automatically parallel generation technique for tetrahedral meshes Summary : In order to prepare modern nite element analysis a program for the eecient parallel generation of tetrahedral meshes in a wide class of three dimensional domains having a generalized cylindric shape is presented. The applied mesh generation strategy is based on the decomposition of some 2D-reference domain into s...
Image-based modeling of semi-transparent, dynamic phenomena is a challenging task. We present an optical tomography method that uses an adaptive grid for the reconstruction of a three-dimensional density function from its projections. The proposed method is applied to reconstruct thin smoke and flames volumetrically from synchronized multi-video recordings. Our adaptive reconstruction algorithm...
This paper studies reasoning for the purpose of uncovering hidden assignments of values to a finite set of variables based on data acquired incrementally over time. This reasoning task, referred to here as datadriven refinement, is found in tasks such as diagnosis and learning. An empirical study is undertaken to evaluate the utility of knowledge gained from observations in effectively solving ...
Level set functions are widely used for expressing implicit surfaces. In some cases, people are more interested in solution near the surface while global information is also required. The aim of this work is the development of an automatic, adaptive mesh refinement strategy for level set functions. Level set function is defined in adaptive space mesh grid with finer grids close to the surface. ...
This paper describes the program execution framework being developed by the Grid Application Development Software (GrADS) Project. The goal of this framework is to provide good resource allocation for Grid applications and to support adaptive reallocation if performance degrades because of changes in the availability of Grid resources. At the heart of this strategy is the notion of a configurab...
This work presents a new technique for generating the base mesh for an adaptive mesh generated by a sketch based modeling system. The method uses topology information of the region inside a closed curve to create a good quality base mesh, with controlled vertex valence, and few irregular vertices. The base mesh is refined using an inflation of the region inside the curve to form the final mesh....
Adaptive mesh refinement techniques can be applied to increase the efficiency of electrical impedance tomography reconstruction algorithms by reducing computational and storage cost as well as providing problem-dependent solution structures. A self-adaptive refinement algorithm based on an a posteriori error estimate has been developed and its results are shown in comparison with uniform mesh r...
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