Existence of Steady Subsonic Euler Flows through Infinitely Long Periodic Nozzles

Details Existence of Steady Subsonic Euler Flows through Infinitely Long Periodic Nozzles Existence of Steady Subsonic Euler Flows through Infinitely Long Periodic Nozzles

2011-01-31

arxiv.org/abs/1101.6010v1

Mathematics

Analysis of PDEs

Scientific paper

In this paper, we study the global existence of steady subsonic Euler flows through infinitely long nozzles which are periodic in $x_1$ direction with the period $L$. It is shown that when the variation of Bernoulli function at some given section is small and mass flux is in a suitable regime, there exists a unique global subsonic flow in the nozzle. Furthermore, the flow is also periodic in $x_1$ direction with the period $L$. If, in particular, the Bernoulli function is a constant, we also get the existence of subsonic-sonic flows when the mass flux takes the critical value.

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