A note on spherically symmetric isentropic compressible flows with density-dependent viscosity coefficients

Details A note on spherically symmetric isentropic compressible flows with density-dependent viscosity coefficients A note on spherically symmetric isentropic compressible flows with density-dependent viscosity coefficients

2007-12-27

arxiv.org/abs/0712.4223v1

Mathematics

Analysis of PDEs

19 pages

Scientific paper

In this note, by constructing suitable approximate solutions, we prove the existence of global weak solutions to the compressible Navier-Stokes equations with density-dependent viscosity coefficients in the whole space $\mathbb{R}^N$, $N\geq2$ (or exterior domain), when the initial data are spherically symmetric. In particular, we prove the existence of spherically symmetric solutions to the Saint-Venant model for shallow water in the whole space (or exterior domain).

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