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arXiv 1606.01007math.AP
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Vlasov/可压缩Navier-斯托克斯方程的大时间行为的再研究

A revisit to the large-time behavior of the Vlasov/compressible Navier-Stokes equations

Young-Pil Choi

摘要:

我们建立了耦合动力学-流体方程的大时间行为。更准确地说,我们考虑耦合到可压缩等熵Navier-斯托克斯方程通过一个阻力强迫项的Vlasov方程。对于这个系统,大的时间行为显示出粒子和流体速度之间的指数排列随着时间的推移。这改进了Bae-Choi-Ha-Kang[Disc.续动力学Sys. A,34,(2014),4419- 4458],其中他们考虑了具有粒子的非局部速度对准力的Vlasov/Navier-斯托克斯方程。采用一个新的李雅普诺夫泛函测量的波动的动量和质量的平均量,我们完善的大时间行为的解决方案,该系统的假设。

英文摘要:

We establish the large-time behavior for the coupled kinetic-fluid equations. More precisely, we consider the Vlasov equation coupled to the compressible isentropic Navier-Stokes equations through a drag forcing term. For this system, the large-time behavior shows the exponential alignment between particles and fluid velocities as time evolves. This improves the previous result by Bae-Choi-Ha-Kang[Disc. Cont. Dyn. Sys. A, 34, (2014), 4419--4458] in which they considered the Vlasov/Navier-Stokes equations with nonlocal velocity alignment forces for particles. Employing a new Lyapunov functional measuring the fluctuations of momentum and mass from the averaged quantities, we refine assumptions for the large-time behavior of the solutions to that system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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