报告题目：Steady collision of two jets issuing from two axially symmetric channels

报告人：王永富（西南财经大学副教授）

报告时间：2021年12月8日上午10:00-12:00

腾讯会议ID： 648 739 104

报告人简介：王永富，男，博士。2017年博士毕业于四川大学。研究方向是非线性偏微分方程理论与应用，主要研究兴趣为高维Navier-Stokes方程组强解的适定性和理想流体的自由边界问题。在Arch. Rational Mech. Anal.、Calc. Var. PDEs、SIAM Math. Anal.、Ann. Inst. H. Poincaré Anal. Non Linéaire、J. Differential Equations、J. Lond. Math. Soc. (2) 等国际著名学术刊物发表学术论文20余篇。主持国家自然科学基金青年和面上项目各1项。

报告摘要：In this talk, we will discuss the mathematical theory on collision of two incompressible jets emerging from two axially symmetric nozzles.  This work is motivated by the famous survey in 1989 by A. Friedman.  More precisely, we showed that for any given mass fluxes $M_1>0$ and $M_2<0$ in two nozzles respectively, that there exists an incompressible, inviscid impinging outgoing jet with contact discontinuity.  Furthermore, we showed that there is no stagnation point in the flow field and its closure, except one point on the symmetric axis. Some asymptotic behavior of the impinging jet in upstream and downstream and geometric properties of the free stream surfaces are also obtained. This is a joint work with Lili Du (SCU).