题目一:Emergent dynamics of Cucker--Smale particles under the effects of random communication and incompressible fluids
内容简介:We study the dynamics of infinitely many Cucker-Smale(C-S) flocking particles under the interplay of a random communication and incompressible fluid. For the dynamics of ensemble of flocking particles, we use the kinetic Cucker-Smale-Fokker-Planck (CS-FP) equation with a degenerate diffusion coefficient, whereas for the fluid part, we use the incompressible Navier-Stokes(N-S) equations. These two subsystems are coupled via the drag force. For this coupled model, we present global existence of weak and strong solutions in $/bbr^d $ $(d=2 or 3)$. Under extra regularity assumptions of initial data, the unique solvability of strong solutions is also established in $/bbr^2$. In a large coupling regime and a periodic spatial domain, we show that the velocities of C-S particles and fluids are asymptotically aligned to constant velocities in a two-dimensional periodic spatial domain $/bbt^2:=/bbr^2//bbz^2$.
报告人:中科院武汉物理数学研究所 肖清华 副研究员
报告人简介:肖清华博士毕业于武汉大学,现为中科院武汉物理与数学研究所副研究员,研究生导师。主要从事非线性偏微分方程的研究,在Boltzmann方程和与Cucker Smale 方程相关的动力学解的适定性与双曲型偏微分方程波的稳定性方面做了一系列的工作,在 JFA,SIAM J.Math.Anal, J. Stat. Phys., J. Differential Equations 等国际期刊上发表论文近20篇。
时 间:2017年4月27日(周四)下午2:30始
题目二:On the Vlasov-Poisson-Boltzmann Limit of Vlasov-Maxwell-Boltzmann system
内容简介:The Vlasov-Maxwell-Boltzmann system is shown to converge to the Vlasov-Poisson-Boltzmann system globally in time at the limit of infinite light velocity. This is a joint work with Prof. Jiang Ning and Prof. Zhao Huijiang.
报告人:华中科技大学 雷远杰 博士
报告人简介:雷远杰博士毕业于武汉大学,现任职于华中科技大学数学与统计学院。主要从事非线性偏微分方程的研究,在Boltzmann方程及相关动理学方程等方面做出了一系列的工作,在Comm. Math. Phys., JFA, J. Stat. Phys., J. Differential Equations 等国际期刊上发表论文10余篇。
时 间:2017年4月27日(周四)下午3:30始
地 点:南海楼224研习室
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2017年4月21日