Abstract
This paper deals with the fourth-order parabolic equation \(u_{t}+{\varDelta }^{2}u=u^{p(x)}\log u\) in a bounded domain, subject to homogeneous Navier boundary conditions. For subcritical and critical initial energy cases, we combine the Galerkin’s method with the generalized potential well method to prove the existence of global solutions. By the concavity arguments, we obtain the results about blow-up solutions. For super critical initial energy case, we use some ordinary differential inequalities to study the extinction of solutions. Moreover, extinction rate, blow-up rate and time, and decay estimate of solutions are discussed.
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The authors would like to express their sincerely thanks to the Editor and the Reviewers for the constructive comments to improve this paper.
Funding
This paper is supported by the Shandong Provincial Natural Science Foundation of China (ZR2021MA003, ZR2020MA020).
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Liu, B., Zhang, M. Classification of Singular Solutions in a Nonlinear Fourth-Order Parabolic Equation. J Dyn Control Syst 29, 455–474 (2023). https://doi.org/10.1007/s10883-022-09597-y
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DOI: https://doi.org/10.1007/s10883-022-09597-y