Why this simulation is possible.
 

Hello everybody~!

I have a question while runnig simulation.
I've run simulation with wrong boundary condition.
I've run simulation for pipe flow and set inlet properly.
But I've set both wall and outlet to wall so that there is no flow out in this pipe.
Even though there is no flow out in this simulation, simulation doesn't get bombed.
In my opinion, even though convergence is just done without numerical problem, it is not representing proper physical situation but I'm not sure.
Is it really possible?
Actually I can't believe it that simulation is done properly in terms of numerical method even though I can see simulation is done with convergence.