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arXiv 2307.04567math.AP
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具有大非线性漂移和Robin边界数据的反应扩散问题的均匀化

Homogenization of a reaction-diffusion problem with large nonlinear drift and Robin boundary data

Vishnu Raveendran, Ida de Bonis, Emilio N. M. Cirillo, Adrian Muntean

AI总结:

本文研究无界穿孔域中带大非线性漂移和Robin边界条件的反应扩散问题周期均匀化,利用带漂移的双尺度紧性方法严格推导升尺度模型与有效系数,并给出校正函数的强收敛结果。

摘要:

我们研究了一个具有大非线性漂移和Robin边界条件的反应扩散问题在无界穿孔域中的周期均匀化。该非线性问题与完全非对称简单排他过程(TASEP)的流体动力学极限相关,该过程描述了一群相互作用的粒子穿越含有障碍物的区域。我们感兴趣的是,在微观动力学与特定的特征长度和时间尺度选择相关联从而导致非线性漂移爆发的情形下,严格推导出升尺度模型方程及相应的有效系数。主要的数学困难在于证明通过均匀化极限所需的双尺度紧性和强收敛结果。为了应对这一情况,我们使用了带漂移的双尺度紧性概念,它类似于更经典的双尺度紧性结果,但现在是在运动坐标系中定义的。我们还给出了校正函数的强收敛结果,由此开始探索目标非线性漂移问题的均匀化过程收敛速率的阶数。

英文摘要:

We study the periodic homogenization of a reaction-diffusion problem with large nonlinear drift and Robin boundary condition posed in an unbounded perforated domain. The nonlinear problem is associated with the hydrodynamic limit of a totally asymmetric simple exclusion process (TASEP) governing a population of interacting particles crossing a domain with obstacle. We are interested in deriving rigorously the upscaled model equations and the corresponding effective coefficients for the case when the microscopic dynamics are linked to a particular choice of characteristic length and time scales that lead to an exploding nonlinear drift. The main mathematical difficulty lies in proving the two-scale compactness and strong convergence results needed for the passage to the homogenization limit. To cope with the situation, we use the concept of two-scale compactness with drift, which is similar to the more classical two-scale compactness result but it is defined now in moving coordinates. We provide as well a strong convergence result for the corrector function, starting this way the search for the order of the convergence rate of the homogenization process for our target nonlinear drift problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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