Dynamical behaviors for 1D compressible Navier–Stokes equations with density-dependent viscosity
Dynamical behaviors for 1D compressible Navier–Stokes equations with density-dependent viscosity
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具有密度相关粘度的一维可压缩纳维斯托克斯方程的动力学行为
DOI:
10.1016/j.jde.2009.11.029
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发表时间:
2010-04
影响因子:
2.4
通讯作者:
郭真华
中科院分区:
文献类型:
--
作者:
郭真华
The dynamical behaviors of vacuum states for one-dimensional compressible Navier–Stokes equations with density-dependent viscosity coefficient are considered. It is first shown that a unique strong solution to the free boundary value problem exists globally in time, the free boundary expands outwards at an algebraic rate in time, and the density is strictly positive in any finite time but decays pointwise to zero time-asymptotically. Then, it is proved that there exists a unique global weak solution to the initial boundary value problem when the initial data contains discontinuously a piece of continuous vacuum and is regular away from the vacuum. The solution is piecewise regular and contains a piece of continuous vacuum before the time T∗>0, which is compressed at an algebraic rate and vanishes at the time T∗, meanwhile the weak solution becomes either a strong solution or a piecewise strong one and tends to the equilibrium state exponentially.
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