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Numerical approximation of the fractional Cahn-Hilliard equation by operator splitting method

Published: 01 July 2020 Publication History

Abstract

In this paper, we consider a fast explicit operator splitting method for a fractional Cahn-Hilliard equation with spatial derivative (Δ)α2(α ∈ (1,2]), where the choice α = 2 corresponds to the classical Cahn-Hilliard equation. The original problem is split into linear and nonlinear subproblems. For the linear part, the pseudo-spectral method is adopted, and thus an ordinary differential equation is obtained. For the nonlinear part, a second-order SSP-RK method together with the pseudo-spectral method is used. The stability and convergence of the proposed method in L2-norm are studied. We also carry out a comparative study of two classical definitions for fractional Laplacian (Δ)α2, and numerical results obtained using computational simulation of the fractional Cahn-Hilliard equation for a variety of choices of fractional order α are presented. It is observed that the fractional order α controls the sharpness of the interface, which is typically diffusive in integer-order phase-field models.

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Cited By

View all
  • (2022)Preconditioners with Symmetrized Techniques for Space Fractional Cahn-Hilliard EquationsJournal of Scientific Computing10.1007/s10915-022-01900-092:2Online publication date: 28-Jun-2022
  • (2021)Stability and Error Estimate of the Operator Splitting Method for the Phase Field Crystal EquationJournal of Scientific Computing10.1007/s10915-020-01386-886:1Online publication date: 1-Jan-2021
  • (2021)An efficient second-order energy stable BDF scheme for the space fractional Cahn–Hilliard equationBIT10.1007/s10543-021-00843-661:3(1061-1092)Online publication date: 1-Sep-2021

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    Information & Contributors

    Information

    Published In

    cover image Numerical Algorithms
    Numerical Algorithms  Volume 84, Issue 3
    Jul 2020
    408 pages

    Publisher

    Springer-Verlag

    Berlin, Heidelberg

    Publication History

    Published: 01 July 2020
    Accepted: 08 August 2019
    Received: 08 January 2019

    Author Tags

    1. Fractional-in-space Cahn-Hilliard equation
    2. Operator splitting method
    3. Pseudo-spectral method
    4. SSP-RK method
    5. Stability and convergence

    Author Tags

    1. 35R11
    2. 65M70
    3. 65M06
    4. 65M12

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    View all
    • (2022)Preconditioners with Symmetrized Techniques for Space Fractional Cahn-Hilliard EquationsJournal of Scientific Computing10.1007/s10915-022-01900-092:2Online publication date: 28-Jun-2022
    • (2021)Stability and Error Estimate of the Operator Splitting Method for the Phase Field Crystal EquationJournal of Scientific Computing10.1007/s10915-020-01386-886:1Online publication date: 1-Jan-2021
    • (2021)An efficient second-order energy stable BDF scheme for the space fractional Cahn–Hilliard equationBIT10.1007/s10543-021-00843-661:3(1061-1092)Online publication date: 1-Sep-2021

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