Riemann problem for acoustics
The left figure shows the phase plane and the location of the middle state
based on the left state and right state. You should be
able to click on either of the states and drag it to a new location.
The plots on the right show the resulting Riemann solution as a function of
x at one particular time (the solution is self similar).
Thanks to
Mauricio del Razo Sarmina
for developing the javascript for the interactive phase plane pages.