Inviscid and viscous stationary waves of gas flow through contracting-expanding nozzles

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Abstract

In this work we study steady states of one-dimensional viscous isentropic compressible flows through a contracting-expanding nozzle. Treating the viscosity coefficient as a singular parameter, the steady-state problem can be viewed as a singularly perturbed system. For a contracting-expanding nozzle, a complete classification of steady states is given and the existence of viscous profiles is established via the geometric singular perturbation theory. Particularly interesting is the existence of a maximal sub-to-super transonic wave and its role in the formation of other complicated transonic waves consisting of a sub-to-super portion.

Original languageEnglish
Pages (from-to)50-76
Number of pages27
JournalJournal of Differential Equations
Volume248
Issue number1
DOIs
StatePublished - 1 Jan 2010

Keywords

  • Contracting-expanding nozzles
  • Gas flow
  • Sub-to-super transonic waves

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