scholarly journals Cosmos++: Relativistic Magnetohydrodynamics on Unstructured Grids with Local Adaptive Refinement

2005 ◽  
Vol 635 (1) ◽  
pp. 723-740 ◽  
Author(s):  
Peter Anninos ◽  
P. Chris Fragile ◽  
Jay D. Salmonson
Keyword(s):  
Unstructured Grids ◽  
Adaptive Refinement ◽  
Local Adaptive Refinement ◽  
Relativistic Magnetohydrodynamics

An Adaptive EFG-FE Computational Model for Thermal Elasto-Plastic Frictional Contact Problems

2008 ◽  
Vol 33-37 ◽  
pp. 821-826
Author(s):  
Zheng Zhang ◽  
Geng Liu ◽  
Tian Xiang Liu
Keyword(s):  
Frictional Heating ◽  
Contact Problems ◽  
Coupling Model ◽  
Adaptive Refinement ◽  
Frictional Heat ◽  
Plastic Behavior ◽  
Initial Stiffness ◽  
Gradient Based ◽  
Local Adaptive Refinement ◽  
The Cost

An adaptive meshless element-free Galerkin-finite element (EFG-FE) coupling model for thermal elasto-plastic contact problems is developed to investigate the influences of the steady-state frictional heating on the contact performance of two contacting bodies. The thermal elasto-plastic contact problems using the initial stiffness method is presented. The local adaptive refinement strategy and the strain energy gradient-based error estimation for EFG-FE coupling method are combined. The adaptive meshless model takes into account the temperature variation, micro plastic flow, and the coupled thermo-elasto-plastic behavior of the materials, considering the strain-hardening property of the materials and temperature-dependent yield strength. The adaptive model is verified through the contact analysis of a cylinder with an elasto-plastic plane. The thermal effects on the contact pressure, stresses distributions with certain frictional heat inputs are studied. The results show that the accuracy of the solutions from the adaptive refinement model is satisfactory but the cost of the CPU time is much less than that for the uniform refinement calculation.

scholarly journals X3D Moving Grid Methods for Semiconductor Applications

VLSI Design ◽  
1998 ◽  
Vol 8 (1-4) ◽  
pp. 117-121 ◽  
Author(s):  
Andrew Kuprat ◽  
David Cartwright ◽  
J. Tinka Gammel ◽  
Denise George ◽  
Brian Kendrick ◽  
...  
Keyword(s):  
Grain Growth ◽  
Unstructured Grids ◽  
Optimization Algorithms ◽  
Front Tracking ◽  
Adaptive Refinement ◽  
Moving Grid ◽  
Los Alamos ◽  
Adaptive Smoothing

The Los Alamos 3D grid toolbox handles grid maintenance chores and provides access to a sophisticated set of optimization algorithms for unstructured grids. The application of these tools to semiconductor problems is illustrated in three examples: grain growth, topographic deposition and electrostatics. These examples demonstrate adaptive smoothing, front tracking, and automatic, adaptive refinement/derefinement.

scholarly journals Local adaptive refinement method applied to solid mechanics

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
Loic Daridon ◽  
Eric Delaume ◽  
Yann Monerie ◽  
Frédéric Perales
Keyword(s):  
Solid Mechanics ◽  
Point Of View ◽  
Adaptive Refinement ◽  
Test Cases ◽  
Refinement Method ◽  
Large Gradient ◽  
Function Point ◽  
Refined Meshes ◽  
Local Adaptive Refinement ◽  
Boundary Curves

A good spatial discretization is of prime interest in the accuracy of the Finite Element Method. This paper presents a new refinement criterion dedicated to an h-type refinement method called Conforming Hierarchical Adaptive Refinement MethodS (CHARMS) and applied to solid mechanics. This method produces conformally refined meshes and deals with refinement from a basis function point of view. The proposed refinement criterion allow adaptive refinement where the mesh is still too coarse and where a strain or a stress field has a large value or a large gradient. The sensitivity of the criterion to the value or to the gradient ca be adjusted. The method and the criteria are validated through 2-D test cases. One limitation of the h-adaptive refinement method is highlighted: the discretization of boundary curves.

Propagation of longest-edge mesh patterns in local adaptive refinement

2006 ◽  
Vol 24 (7) ◽  
pp. 543-553 ◽  
Author(s):  
J. P. Suárez ◽  
A. Plaza ◽  
G. F. Carey
Keyword(s):  
Adaptive Refinement ◽  
Local Adaptive Refinement

scholarly journals A local adaptive refinement method with multigrid preconditionning illustrated by multiphase flows simulations.

2009 ◽  
Vol 27 ◽  
pp. 15-53 ◽  
Author(s):  
Franck Boyer ◽  
Celine Lapuerta ◽  
Sebastian Minjeaud ◽  
Bruno Piar
Keyword(s):  
Multiphase Flows ◽  
Adaptive Refinement ◽  
Refinement Method ◽  
Local Adaptive Refinement
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