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A flux-free a posteriori error estimator for the incompressible Stokes problem using a mixed FE formulation
dc.contributor.author | Larsson, Fredrik |
dc.contributor.author | Díez, Pedro |
dc.contributor.author | Huerta, Antonio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada III |
dc.date.accessioned | 2010-11-16T12:22:10Z |
dc.date.available | 2010-11-16T12:22:10Z |
dc.date.created | 2010-08-01 |
dc.date.issued | 2010-08-01 |
dc.identifier.citation | Larsson, F.; Díez, P.; Huerta, A. A flux-free a posteriori error estimator for the incompressible Stokes problem using a mixed FE formulation. "Computer methods in applied mechanics and engineering", 01 Agost 2010, vol. 199, núm. 37-40, p. 2383-2402. |
dc.identifier.issn | 0045-7825 |
dc.identifier.uri | http://hdl.handle.net/2117/10309 |
dc.description.abstract | In this contribution, we present an a posteriori error estimator for the incompressible Stokes problem valid for a conventional mixed FE formulation. Due to the saddle-point property of the problem, conventional error estimators developed for pure minimization problems cannot be utilized straight-forwardly. The new estimator is built up by two key ingredients. At first, a computed error approximation, exactly fulfilling the continuity equation for the error, is obtained via local Dirichlet problems. Secondly, we adopt the approach of solving local equilibrated flux-free problems in order to bound the remaining, incompressible, error. In this manner, guaranteed upper and lower bounds, of the velocity “energy norm” of the error as well as goaloriented (linear) output functionals, with respect to a reference (overkill) mesh are obtained. In particular, it should be noted that this approach requires no computation of hybrid fluxes. Furthermore, the estimator is applicable to mixed FE formulations using continuous pressure approximations, such as the Mini and Taylor– Hood class of elements. In conclusion, a few simple numerical examples are presented, illustrating the accuracy of the error bounds. |
dc.format.extent | 20 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits |
dc.subject.lcsh | Finite element method |
dc.subject.lcsh | Error functions |
dc.subject.lcsh | Numerical analysis |
dc.subject.lcsh | Navier-Stokes equations |
dc.title | A flux-free a posteriori error estimator for the incompressible Stokes problem using a mixed FE formulation |
dc.type | Article |
dc.subject.lemac | Elements finits, Mètode dels |
dc.subject.lemac | Anàlisi numèrica |
dc.subject.lemac | Equacions de Navier-Stokes |
dc.contributor.group | Universitat Politècnica de Catalunya. LACÀN - Mètodes Numèrics en Ciències Aplicades i Enginyeria |
dc.identifier.doi | 10.1016/j.cma.2010.03.011 |
dc.rights.access | Open Access |
local.identifier.drac | 2748694 |
dc.description.version | Postprint (published version) |
local.citation.author | Larsson, F.; Díez, P.; Huerta, A. |
local.citation.publicationName | Computer methods in applied mechanics and engineering |
local.citation.volume | 199 |
local.citation.number | 37-40 |
local.citation.startingPage | 2383 |
local.citation.endingPage | 2402 |
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