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An Optimal Preconditioned FFT-accelerated Finite Element Solver for Homogenization

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00362316" target="_blank" >RIV/68407700:21110/23:00362316 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1016/j.amc.2023.127835" target="_blank" >https://doi.org/10.1016/j.amc.2023.127835</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.amc.2023.127835" target="_blank" >10.1016/j.amc.2023.127835</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    An Optimal Preconditioned FFT-accelerated Finite Element Solver for Homogenization

  • Original language description

    We generalize and provide a linear algebra-based perspective on a finite element (FE) homogenization scheme, pioneered by Schneider et al.[1] and Leuschner and Fritzen [2]. The efficiency of the scheme is based on a preconditioned, well-scaled reformulation allowing for the use of the conjugate gradient or similar iterative solvers. The geometrically-optimal preconditioner---a discretized Green’s function of a periodic homogeneous reference problem---has a block-diagonal structure in the Fourier space which permits its efficient inversion using fast Fourier transform (FFT) techniques for generic regular meshes. This implies that the scheme scales as $mathcal{O}(n log(n))$, like FFT, rendering it equivalent to spectral solvers in terms of computational efficiency. However, in contrast to classical spectral solvers, the proposed scheme works with FE shape functions with local supports and does not exhibit the Fourier ringing phenomenon. We show that the scheme achieves a number of iterations that are almost independent of spatial discretization. The scheme also scales mildly with phase contrast. We also discuss the equivalence between our displacement-based scheme and the recently proposed strain-based homogenization technique with finite-element projection.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10102 - Applied mathematics

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    APPLIED MATHEMATICS AND COMPUTATION

  • ISSN

    0096-3003

  • e-ISSN

    1873-5649

  • Volume of the periodical

    2023

  • Issue of the periodical within the volume

    6

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    19

  • Pages from-to

  • UT code for WoS article

    000927389700001

  • EID of the result in the Scopus database

    2-s2.0-85147094097