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A two-grids/projection algorithm for obstacle problems

โœ Scribed by A. Caboussat; R. Glowinski

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
481 KB
Volume
50
Category
Article
ISSN
0898-1221

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โœฆ Synopsis

In order to emphasize the possible relatmn between discontinuous and continuous approximations on different meshes, a two-grids method for the resolution of parabolic variational mequality problems is presented. The numemcal methodology combines a time splitting algorithm to decouple a diffusion phenomenon from an obstacle problem. The diffusion problem is solved by using fimte-dlfferences, while pmcewlse hnear fimte-element techmques are used together with a Newton method for the obstacle problem Pro3ectmns are used to interpolate the solution from one grad to the other. Numerical expemments show that the resulting method has good accuracy propertms

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