Global existence of strong solution for the Cucker-Smale-Navier-Stokes system

Hyeong Ohk Bae, Young Pil Choi, Seung Yeal Ha, Moon Jin Kang

Research output: Contribution to journalArticle

27 Citations (Scopus)


We present a global existence theory for strong solution to the Cucker-Smale-Navier-Stokes system in a periodic domain, when initial data is sufficiently small. To model interactions between flocking particles and an incompressible viscous fluid, we couple the kinetic Cucker-Smale model and the incompressible Navier-Stokes system using a drag force mechanism that is responsible for the global flocking between particles and fluids. We also revisit the emergence of time-asymptotic flocking via new functionals measuring local variances of particles and fluid around their local averages and the distance between local averages velocities. We show that the particle and fluid velocities are asymptotically aligned to the common velocity, when the viscosity of the incompressible fluid is sufficiently large compared to the sup-norm of the particles' local mass density.

Original languageEnglish
Pages (from-to)2225-2255
Number of pages31
JournalJournal of Differential Equations
Issue number6
Publication statusPublished - 2014 Sep 15

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics

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