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arXiv · 1812.01793

Energy Stability and Convergence of SAV Block-centered Finite Difference Method for Gradient Flows

Xiaoli Li·Jie Shen·Hongxing Rui
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Abstract

We present in this paper construction and analysis of a block-centered finite difference method for the spatial discretization of the scalar auxiliary variable Crank-Nicolson scheme (SAV/CN-BCFD) for gradient flows, and show rigorously that scheme is second-order in both time and space in various discrete norms. When equipped with an adaptive time strategy, the SAV/CN-BCFD scheme is accurate and extremely efficient. Numerical experiments on typical Allen-Cahn and Cahn-Hilliard equations are presented to verify our theoretical results and to show the robustness and accuracy of the SAV/CN-BCFD scheme.

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Xiaoli Li, Jie Shen, Hongxing Rui. 2018-12-05. Energy Stability and Convergence of SAV Block-centered Finite Difference Method for Gradient Flows. https://arxiv.org/abs/1812.01793

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