Contents Online
Communications in Mathematical Sciences
Volume 18 (2020)
Number 7
On the free boundary problem of 1D compressible Navier–Stokes equations with heat conductivity dependent of temperature
Pages: 2039 – 2057
DOI: https://dx.doi.org/10.4310/CMS.2020.v18.n7.a9
Authors
Abstract
The free boundary problem of one-dimensional heat conducting compressible Navier–Stokes equations with large initial data is investigated. We obtain the global existence of strong solution under stress-free boundary condition along the free surface, where the heat conductivity depends on temperature $(\kappa = \overline{\kappa} \theta^b , b \in (0, \infty))$ and the viscosity coefficient depends on density $(\mu = \overline{\mu} (1 + \rho^a) , a \in [ 0, \infty))$. Moreover, the large-time behavior of the free boundary for the full compressible Navier–Stokes equations is also considered when the viscosity is constant and it is first shown that the interfaces which separate the gas from vacuum will expand outwards at an algebraic rate in time for all $\gamma \gt 1$.
Keywords
compressible Navier–Stokes equations, temperature-dependent heat conductivity, free boundary, global strong solution, large-time behavior
2010 Mathematics Subject Classification
35Q30, 35R35, 76N10
Li is supported by the NSFC (No. 11701443, No.11601128, No.11671319, No.11931013), Fund of HPU (No.B2016-57). Ye is partially supported by NSFC (No.11701145, No.11971147) and Project funded by China Postdoctoral Science Foundation (No. 2020M672196).
Received 4 September 2018
Accepted 21 May 2020
Published 11 December 2020