One-dimensional compressible flow with temperature dependent transport coefficients

Helge Kristian Jenssen, Trygve Klovning Karper

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

We establish the existence of global-in-time weak solutions to the one-dimensional,compressible Navier-Stokes system for a viscous and heat conducting ideal polytropic gas (pressure p = Kθ/t, internal energy e = cvθ) when the viscosity μ is constant and the heat conductivity κ depends on the temperature θ according to κ(θ) = κ̄θβ, with 0 ≤ β < 3/2. This choice of degenerate transport coefficients is motivated by the kinetic theory of gasses. Approximate solutions are generated by a semidiscrete finite element scheme. We first formulate sufficient conditions that guarantee convergence to a weak solution. The convergence proof relies on weak compactness and convexity,and it applies to the more general constitutive relations μ(θ) = μ̄ θα, κ(θ) = κ̄θβ, with α ≥ 0,0 ≤ β ≤ 2 (μ̄, κ̄ constants). We then verify the sufficient conditions in the case α = 0 and 0 ≤ β < 3/2 . The data are assumed to be without vacuum, mass concentrations, or vanishing temperatures, and the same holds for the weak solutions.

Original languageEnglish (US)
Pages (from-to)904-930
Number of pages27
JournalSIAM Journal on Mathematical Analysis
Volume42
Issue number2
DOIs
StatePublished - May 14 2010

All Science Journal Classification (ASJC) codes

  • Analysis
  • Computational Mathematics
  • Applied Mathematics

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