数学系"60周年"系庆系列报告
报告主题：Wave phenomena to three-dimensional fluid-particle model
报告人：李海梁 教授（长江学者、杰青） （首都师范大学）
报告时间：2020年8月6日（周四） 9:00-10:00
参会方式：腾讯会议
https://meeting.tencent.com/s/ihiWxXIOL8Gy
会议ID：687 823 729
主办部门：理学院数学系
报告摘要：We investigate the wave phenomena to a fluid-particle model described by the multi-dimensional compressible Euler/Navier-Stokes coupled with the Vlasov-Fokker-Planck equation (Euler-VFP or NS-VFP) through the relaxation drag force on the fluid momentum equation and the Vlasov force on the particle transport. We prove the globally nonlinear time-asymptotical stability of the planar rarefaction wave to 3D Euler-VFP system, which as we know is the first result about the nonlinear stability of basic hyperbolic waves for the multi-dimensional compressible Euler equations with low order dissipative effects (i.e., relaxation friction damping). This new (hyperbolic) wave phenomena comes essentially from the fluid-particle interactions through the relaxation friction damping, which is different from the interesting diffusive phenomena for either the compressible Euler equations with damping or the pure Fokker-Planck equation. Similar phenomena is also shown for 3D compressible NS-VFP, and it is further proved that as the shear and bulk viscosities tend to zero, the global solution to 3D compressible NS-VFP system around the planar rarefaction wave converges to that of 3D Euler-VFP system at the uniform rate with respect to the viscosity coefficients. This is joint work with Teng Wang (BJUT) and Yi Wang (AMSS) .
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