報告題目：Steady collision of two jets issuing from two axially symmetric channels

報告人：王永富（西南財經大學副教授）

報告時間：2021年12月8日上午10:00-12:00

騰訊會議ID： 648 739 104

報告人簡介：王永富,，男,，博士。2017年博士畢業(yè)于四川大學,。研究方向是非線性偏微分方程理論與應用,，主要研究興趣為高維Navier-Stokes方程組強解的適定性和理想流體的自由邊界問題,。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) 等國際著名學術刊物發(fā)表學術論文20余篇,。主持國家自然科學基金青年和面上項目各1項。

報告摘要：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).