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- W2020351614 abstract "This work shows that the Cahn–Hilliard theory of diffusive phase separation is related to an intrinsic mixed variational principle that determines the rate of concentration and the chemical potential. The principle characterizes a canonically compact model structure, where the two balances involved for the species content and microforce appear as the Euler equations of a variational statement. The existence of the variational principle underlines an inherent symmetry in the two-field representation of the Cahn–Hilliard theory. This can be exploited in the numerical implementation by the construction of time- and space-discrete incremental potentials , which fully determine the update problems of typical time-stepping procedures. The mixed variational principles provide the most fundamental approach to the finite-element solution of the Cahn–Hilliard equation based on low-order basis functions, leading to monolithic symmetric algebraic systems of iterative update procedures based on a linearization of the nonlinear problem. They induce in a natural format the choice of symmetric solvers for Newton-type iterative updates, providing a speed-up and reduction of data storage when compared with non-symmetric implementations. In this sense, the potentials developed are believed to be fundamental ingredients to a deeper understanding of the Cahn–Hilliard theory." @default.
- W2020351614 created "2016-06-24" @default.
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- W2020351614 date "2014-04-08" @default.
- W2020351614 modified "2023-09-27" @default.
- W2020351614 title "Mixed variational potentials and inherent symmetries of the Cahn–Hilliard theory of diffusive phase separation" @default.
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- W2020351614 doi "https://doi.org/10.1098/rspa.2013.0641" @default.
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