Large-time behavior for spherically symmetric flow of viscous polytropic   gas in exterior unbounded domain with large initial data
  This paper deals with the spherically symmetric flow of compressible viscous and polytropic ideal fluid in unbounded domain exterior to a ball in $\mathbb{R}^n$ with $n\ge2$. We show that the global solutions are convergent as time goes to infinity. The critical step is obtaining the point-wise bound of the specific volume $v(x,t)$ and the absolute temperature $\theta(x,t)$ from up and below both for $x$ and $t$. Note that the initial data can be arbitrarily large and, compared with \cite{nn}, our method applies to the spatial dimension $n=2.$ The proof is based on the elementary energy methods. 
Zhilei Liang
math.AP