Global classical solutions and large-time behavior of the two-phase fluid model

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23 Citations (Scopus)


We study the global existence of a unique strong solution, and its large-time behavior, of a two-phase fluid system consisting of the compressible isothermal Euler equations coupled with compressible isentropic Navier-Stokes equations through a drag forcing term. The coupled system can be derived as the hydrodynamic limit of the Vlasov-Fokker-Planck/isentropic Navier-Stokes equations with strong local alignment forces. When the initial data are sufficiently small and regular, we establish the unique existence of the global Hs-solutions in a perturbation framework. We also provide the large-time behavior of classical solutions showing the alignment between two fluid velocities exponentially fast as time evolves. For this, we construct a Lyapunov function measuring the fluctuations of momentum and mass from its averaged quantities.

Original languageEnglish
Pages (from-to)3090-3122
Number of pages33
JournalSIAM Journal on Mathematical Analysis
Issue number5
Publication statusPublished - 2016

Bibliographical note

Publisher Copyright:
© 2016 Society for Industrial and Applied Mathematics.

All Science Journal Classification (ASJC) codes

  • Analysis
  • Computational Mathematics
  • Applied Mathematics


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