Acta mathematica scientia,Series B ›› 2012, Vol. 32 ›› Issue (1): 315-324.doi: 10.1016/S0252-9602(12)60019-8

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CAUCHY PROBLEM FOR THE ONE-DIMENSIONAL COMPRESSIBLE NAVIER-STOKES EQUATIONS

 LIAN Ru-Xu1, LIU Jian2, LI Hai-Liang2, XIAO Ling3   

  1. 1. College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450011, China;
    2. Department of Mathematics, Capital Normal University, Beijing 100048, China;
    3. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2011-11-17 Online:2012-01-20 Published:2012-01-20
  • Supported by:

    The research of R.X. Lian is supported by NSFC (11101145). The research of H.L. Li is partially supported by NSFC (10871134, 11171228), the Huo Ying Dong Fund (111033), the Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (PHR201006107). The research of L. Xiao is supported by NSFC (11171327).

Abstract:

We consider the Cauchy problem for one-dimensional isentropic compressible Navier-Stokes equations with density-dependent viscosity coe?cient. For regular initial data, we show that the unique strong solution exits globally in time and converges to the equilibrium state time asymptotically. When initial density is piecewise regular with jump discontinuity, we show that there exists a unique global piecewise regular solution. In
particular, the jump discontinuity of the density decays exponentially and the piecewise regular solution tends to the equilibrium state as t → +∞.

Key words: Navier-Stokes equations, discontinuous initial data

CLC Number: 

  • 35B40
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