Anderson acceleration for a regularized Bingham model

Anderson acceleration for a regularized Bingham model
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正则化宾汉姆模型的安德森加速

DOI:
10.1002/num.23028
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发表时间:
2023
影响因子:
3.9
通讯作者:
Vargun, Duygu
Vargun, Duygu
中科院分区:
数学3区
文献类型:
--
作者:
Pollock, Sara;Rebholz, Leo G.;Vargun, Duygu

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本文研究了描述粘塑性流动的正则化宾汉方程的有限元离散。一个有效的非线性求解器的离散模型,然后提出和分析。求解器是基于安德森加速度(AA)应用到皮卡德迭代,我们显示加速收敛的方法,通过应用AA理论(最近开发的作者)的迭代,后显示足够的光滑性相关的不动点算子。提供了空间收敛的数值测试,作为2D和3D驱动腔模拟模型的结果。对于每个数值测试,所提出的非线性求解器也进行了测试,并证明是非常有效的和强大的正则化参数,因为它去零。
This article studies a finite element discretization of the regularized Bingham equations that describe viscoplastic flow. An efficient nonlinear solver for the discrete model is then proposed and analyzed. The solver is based on Anderson acceleration (AA) applied to a Picard iteration, and we show accelerated convergence of the method by applying AA theory (recently developed by the authors) to the iteration, after showing sufficient smoothness properties of the associated fixed point operator. Numerical tests of spatial convergence are provided, as are results of the model for 2D and 3D driven cavity simulations. For each numerical test, the proposed nonlinear solver is also tested and shown to be very effective and robust with respect to the regularization parameter as it goes to zero.
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DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
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