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- W3136792010 abstract "This letter revisits the energy quadratization (EQ) method by introducing a novel and essential relaxation technique to improve its accuracy and stability. The EQ method has witnessed significant popularity in the past few years. Though acknowledging its effectiveness in designing energy-stable schemes for thermodynamically consistent models, the primary known drawback is apparent, i.e., its preserves a modified energy law represented by auxiliary variables instead of the original variables. Truncation errors are introduced during numerical calculations so that the numerical solutions of the auxiliary variables are no longer equivalent to their original continuous definitions. Even though the modified energy dissipation law is preserved, the original energy dissipation law is not guaranteed. In this paper, we overcome this issue by introducing a relaxation technique. The computational cost of this extra technique is negligible compared with the baseline EQ method. Meanwhile, the relaxed-EQ method holds all the baseline EQ method's good properties, such as linearity and unconditionally energy stability. Then we apply the relaxed-EQ method to several widely-used phase field models to highlight its effectiveness." @default.
- W3136792010 created "2021-03-29" @default.
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- W3136792010 date "2021-03-16" @default.
- W3136792010 modified "2023-09-26" @default.
- W3136792010 title "A Revisit of The Energy Quadratization Method with A Relaxation Technique" @default.
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- W3136792010 doi "https://doi.org/10.48550/arxiv.2103.08855" @default.
- W3136792010 hasPublicationYear "2021" @default.
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