An a posteriori error estimator for an unsteady advection-diffusion-reaction problem

An a posteriori error estimator for an unsteady advection-diffusion-reaction problem
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DOI:
10.1016/j.camwa.2013.09.022
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发表时间:
2014
期刊:
Comput. Math. Appl.
影响因子:
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通讯作者:
R. Araya;P. Venegas
R. Araya;P. Venegas
中科院分区:
其他
文献类型:
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作者:
R. Araya;P. Venegas

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在这项工作中,我们对非定常平流-扩散-反应问题引入了残差型的后验误差估计。在时间上的离散采用隐式欧拉格式和空间的连续、分段线性三角有限元,并结合稳定化格式。我们证明了逼近误差是由误差估计量上下有界的。在此基础上,提出了一种自适应算法,并对其进行了分析和数值测试,证明了该方法的有效性。
In this work we introduce an a posteriori error estimator, of the residual type, for the unsteady advection–diffusion–reaction problem. For the discretization in time we use an implicit Euler scheme and a continuous, piecewise linear triangular finite elements for the space together with a stabilized scheme. We prove that the approximation error is bounded, by above and below, by the error estimator. Using that, an adaptive algorithm is proposed, analyzed and tested numerically to prove the efficiency of our approach.