The Cauchy problem for the pressureless Euler/isentropic Navier-Stokes equations

Young Pil Choi, Bongsuk Kwon

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present a new hydrodynamic model consisting of the pressureless Euler equations and the isentropic compressible Navier-Stokes equations where the coupling of two systems is through the drag force. This coupled system can be derived, in the hydrodynamic limit, from the particle-fluid equations that are frequently used to study the medical sprays, aerosols and sedimentation problems. For the proposed system, we first construct the local-in-time classical solutions in an appropriate L2 Sobolev space. We also establish the a priori large-time behavior estimate by constructing a Lyapunov functional measuring the fluctuation of momentum and mass from the averaged quantities, and using this together with the bootstrapping argument, we obtain the global classical solution. The large-time behavior estimate asserts that the velocity functions of the pressureless Euler and the compressible Navier-Stokes equations are aligned exponentially fast as time tends to infinity.

Original languageEnglish
Pages (from-to)654-711
Number of pages58
JournalJournal of Differential Equations
Volume261
Issue number1
DOIs
Publication statusPublished - 2016 Jul 5

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Compressible Navier-Stokes Equations
Large Time Behavior
Euler Equations
Navier Stokes equations
Cauchy Problem
Navier-Stokes Equations
Hydrodynamics
Global Classical Solution
Hydrodynamic Limit
Sobolev spaces
Drag Force
Hydrodynamic Model
Sedimentation
Euler equations
Bootstrapping
Lyapunov Functional
Spray
Aerosol
Classical Solution
Estimate

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics

Cite this

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The Cauchy problem for the pressureless Euler/isentropic Navier-Stokes equations. / Choi, Young Pil; Kwon, Bongsuk.

In: Journal of Differential Equations, Vol. 261, No. 1, 05.07.2016, p. 654-711.

Research output: Contribution to journalArticle

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