arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2101.07982math.AP
收藏

体积-表面反应扩散方程组的整体适定性

Global well-posedness for volume-surface reaction-diffusion systems

Jeff Morgan, Bao Quoc Tang

摘要:

研究了具有质量控制的体积-表面反应扩散方程组的经典解的整体存在性。这样的系统出现自然从模拟的体积域和它的表面出现的浓度或密度的演变,因此引起了相当大的关注。由于体-面耦合的特性,一般系统解的整体存在性是一个具有挑战性的问题。特别是,对偶方法,这是强大的在处理质量守恒系统的域,是不适用的。本文引入一族新的$L^p$ -能量函数,并将其与体积-曲面方程组的对偶方法相结合,在一般的假设条件下(称为\textit{intermediate sum condition}),最终得到了经典解的整体存在性.对于质量守恒但不满足此条件的系统,在准一致条件下,即在扩散系数彼此接近的假设下,显示了全局解。在质量耗散的情况下,我们还表明,解决方案是一致有界的时间通过研究系统的每个单位大小的时空柱,并显示该解决方案是sup-norm有界独立的圆柱。我们的研究结果的应用包括全球存在性和有界性所产生的膜蛋白聚类或激活Cdc 42细胞极化系统。

英文摘要:

We study the global existence of classical solutions to volume-surface reaction-diffusion systems with control of mass. Such systems appear naturally from modeling evolution of concentrations or densities appearing both in a volume domain and its surface, and therefore have attracted considerable attention. Due to the characteristic volume-surface coupling, global existence of solutions to general systems is a challenging issue. In particular, the duality method, which is powerful in dealing with mass conserved systems in domains, is not applicable on its own. In this paper, we introduce a new family of $L^p$-energy functions and combine them with a suitable duality method for volume-surface systems, to ultimately obtain global existence of classical solutions under a general assumption called the \textit{intermediate sum condition}. For systems that conserve mass, but do not satisfy this condition, global solutions are shown under a quasi-uniform condition, that is, under the assumption that the diffusion coefficients are close to each other. In the case of mass dissipation, we also show that the solution is bounded uniformly in time by studying the system on each time-space cylinder of unit size, and showing that the solution is sup-norm bounded independently of the cylinder. Applications of our results include global existence and boundedness for systems arising from membrane protein clustering or activation of Cdc42 in cell polarization.

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。

↑