Nozzle Example
 

Hello Everybody,
I have a question about one of the 2013.2 Avl Fire examples provided in the Manuals
The example is the number 910.
Why do the authors lead me through a simulation with an initial pressure of 5e+007 Pa at the inlet and a 5+005 Pa at the Vol_Outlet finding certain flow quantities ( Pressure,velocity etc. and generating the nozzle file) and then they go with a Spray simulation in an ambient with a 1e+005 Pa?
It's like they don't mind the ambient pressure in the spray simulation isn't it?
Sorry for my bad english and thank you for the attention
Matteo