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arXiv 2301.09459math.NAcs.NA
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含线性化误差和代数误差的非线性问题迭代Galerkin离散的目标导向误差分析

Goal-oriented error analysis of iterative Galerkin discretizations for nonlinear problems including linearization and algebraic errors

Vit Dolejsi, Scott Congreve

摘要:

考虑非线性偏微分方程线性化迭代解的目标定向误差估计。对于伴随问题和迭代求解器,我们认为,而不是原始问题的微分,一个合适的线性化,保证伴随的数值方案的一致性。我们推导出误差估计,并开发了一种有效的自适应算法,该算法平衡了离散化和使用迭代求解器所产生的误差。数值算例表明了该算法的有效性。

英文摘要:

We consider the goal-oriented error estimates for a linearized iterative solver for nonlinear partial differential equations. For the adjoint problem and iterative solver we consider, instead of the differentiation of the primal problem, a suitable linearization which guarantees the adjoint consistency of the numerical scheme. We derive error estimates and develop an efficient adaptive algorithm which balances the errors arising from the discretization and use of iterative solvers. Several numerical examples demonstrate the efficiency of this algorithm.

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