A posteriori estimation of the error in the error estimate

A posteriori estimation of the error in the error estimate

In this paper we address the problem of a posteriori estimation of the error in the error estimate. We consider the case of estimates for the error in the derivatives, the strains, or the stresses, which are constructed in terms of locally-computed element error indicators of the element residual, o...

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Veröffentlicht in:Computer methods in applied mechanics and engineering 1999-07, Vol.176 (1), p.387-418
Hauptverfasser: Strouboulis, T., Babuška, I., Gangaraj, S.K., Copps, K., Datta, D.K.
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container_issue 1
container_start_page 387
container_title Computer methods in applied mechanics and engineering
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creator Strouboulis, T.
Babuška, I.
Gangaraj, S.K.
Copps, K.
Datta, D.K.
description In this paper we address the problem of a posteriori estimation of the error in the error estimate. We consider the case of estimates for the error in the derivatives, the strains, or the stresses, which are constructed in terms of locally-computed element error indicators of the element residual, or the least-squares recovery type. The estimates of the error in the error estimate have the same structure as the original error estimates, and are determined by locally averaging ( recycling) the original error indicators. The most accurate indicators of the error in the error indicators are obtained by employing a ‘harmonic’ basis in the recycling of the indicators, namely, a basis which locally satisfies the partial differential equation and the boundary conditions.
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title A posteriori estimation of the error in the error estimate
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