clawpack/apps — pull request #44 by ketch (2014-10-20 10:28:24+00:00)
Title: Notebooks showing how to set up a shocktube problem with a specified Mach-number shock.

See it on nbviewer here: http://nbviewer.ipython.org/gist/ketch/d31fd8d2d7739e59b6c6

The image link is broken at the moment but should work once nbviewer updates its cache.