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Unconditionally stable compact theta schemes for solving the linear and semi-linear fourth-order diffusion equations

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  • Ran, Maohua
  • Luo, Taibai
  • Zhang, Li

Abstract

This paper is concerned with numerical methods for solving a class of fourth-order diffusion equations. Combining the compact difference operator in space discretization and the linear θ method in time, the compact theta scheme for the linear problem is first proposed. By virtue of the Fourier method, the suggested scheme is shown to be unconditionally stable and convergent in the discrete L2-norm for any θ ∈ [1/2, 1]. And then this idea is generalized to the semi-linear case, the corresponding compact theta scheme is constructed and analyzed in detail. Numerical experiments corresponding to the linear and semi-linear situations are carried out to support our theoretical statements.

Suggested Citation

  • Ran, Maohua & Luo, Taibai & Zhang, Li, 2019. "Unconditionally stable compact theta schemes for solving the linear and semi-linear fourth-order diffusion equations," Applied Mathematics and Computation, Elsevier, vol. 342(C), pages 118-129.
  • Handle: RePEc:eee:apmaco:v:342:y:2019:i:c:p:118-129
    DOI: 10.1016/j.amc.2018.09.026
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    References listed on IDEAS

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    1. Mohanty, R.K. & McKee, Sean & Kaur, Deepti, 2017. "A class of two-level implicit unconditionally stable methods for a fourth order parabolic equation," Applied Mathematics and Computation, Elsevier, vol. 309(C), pages 272-280.
    2. Mohanty, R.K. & Kaur, Deepti, 2016. "High accuracy implicit variable mesh methods for numerical study of special types of fourth order non-linear parabolic equations," Applied Mathematics and Computation, Elsevier, vol. 273(C), pages 678-696.
    3. Zhang, Qifeng & Chen, Mengzhe & Xu, Yinghong & Xu, Dinghua, 2018. "Compact θ-method for the generalized delay diffusion equation," Applied Mathematics and Computation, Elsevier, vol. 316(C), pages 357-369.
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