題目一:Emergent dynamics of Cucker--Smale particles under the effects of random communication and incompressible fluids
内容簡介: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 $/bbt^2:=/bbr^2//bbz^2$.
報告人:中科院武漢物理數學研究所 肖清華 副研究員
報告人簡介:肖清華博士畢業于武漢大學,現為中科院武漢物理與數學研究所副研究員,研究生導師。主要從事非線性偏微分方程的研究,在Boltzmann方程和與Cucker Smale 方程相關的動力學解的适定性與雙曲型偏微分方程波的穩定性方面做了一系列的工作,在 JFA,SIAM J.Math.Anal, J. Stat. Phys., J. Differential Equations 等國際期刊上發表論文近20篇。
時 間:2017年4月27日(周四)下午2:30始
題目二:On the Vlasov-Poisson-Boltzmann Limit of Vlasov-Maxwell-Boltzmann system
内容簡介: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.
報告人:華中科技大學 雷遠傑 博士
報告人簡介:雷遠傑博士畢業于武漢大學,現任職于華中科技大學數學與統計學院。主要從事非線性偏微分方程的研究,在Boltzmann方程及相關動理學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 等國際期刊上發表論文10餘篇。
時 間:2017年4月27日(周四)下午3:30始
地 點:南海樓224研習室
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