Hoe can I solve a system of PDE?

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Giorgio
Giorgio 2014-4-8
Hi, I am trying to solve a system of PDE. The problem is written in cylindrical coordinate. The variable are r (radius) and u (velocity in r direction). f is the force given along r. The other terms are constants. The system is the following
  1. dp/dt + ro*c^2*du/dr + c^2/r*ro*u = 0
  2. ro*du/dt + ro*u*du/dr + dp/dr = f
I solved other PDE with matlab, but with this one I have no idea where to start. Some help?

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