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Long-time integration methods for mesoscopic models of pattern-forming systems

机译:模式形成系统介观模型的长期集成方法

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摘要

Spectral methods for simulation of a mesoscopic diffusion model of surface pattern formation are evaluated for long simulation times. Backwards-differencing time-integration, coupled with an underlying Newton-Krylov nonlinear solver (SUNDIALS-CVODE), is found to substantially accelerate simulations, without the typical requirement of preconditioning. Quasi-equilibrium simulations of patterned phases predicted by the model are shown to agree well with linear stability analysis. Simulation results of the effect of repulsive particle-particle interactions on pattern relaxation time and short/long-range order are discussed.
机译:对于较长的仿真时间,需要评估用于模拟表面图案形成介观扩散模型的光谱方法。向后差分时间积分与底层的Newton-Krylov非线性求解器(SUNDIALS-CVODE)结合在一起,可以大大加速仿真,而无需进行典型的预处理。该模型预测的图案化相位的准平衡模拟与线性稳定性分析非常吻合。讨论了斥力粒子间相互作用对图案弛豫时间和短/远距离有序影响的模拟结果。

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