arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.09290math.AP
收藏

具有阻尼和非局部相互作用的集体行为粘性流体动力学模型的长时间渐近性

On long-time asymptotics for viscous hydrodynamic models of collective behavior with damping and nonlocal interactions

José A. Carrillo, Aneta Wróblewska-Kamińska, Ewelina Zatorska

摘要:

流体动力学系统中产生的群集建模包括非本地力的吸引-排斥势的形式,以及压力项建模强大的本地排斥。我们专注于的情况下,有一个平衡的非局部吸引力和局部压力的存在下,在整个空间的限制。在适当的位势和压力函数假设下,我们证明了具有粘性和线性阻尼的流体动力学模型的整体弱解的存在性。通过在系统中引入线性阻尼,我们保证了系统在紧支撑密度、固定质量和质心条件下定态解的存在唯一性。在密度的支持下,相关的速度场为零。此外,我们还证明了全局弱解在适当的意义下大时间收敛于这些平稳解的集合。在特殊情况下,我们可以确定唯一的极限密度作为自由能的整体极小值与正确的质量和质心。

英文摘要:

Hydrodynamic systems arising in swarming modelling include nonlocal forces in the form of attractive-repulsive potentials as well as pressure terms modelling strong local repulsion. We focus on the case where there is a balance between nonlocal attraction and local pressure in presence of confinement in the whole space. Under suitable assumptions on the potentials and the pressure functions, we show the global existence of weak solutions for the hydrodynamic model with viscosity and linear damping. By introducing linear damping in the system, we ensure the existence and uniqueness of stationary solutions with compactly supported density, fixed mass and center of mass. The associated velocity field is zero in the support of the density. Moreover, we show that global weak solutions converge for large times to the set of these stationary solutions in a suitable sense. In particular cases, we can identify the limiting density uniquely as the global minimizer of the free energy with the right mass and center of mass.

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。

↑