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Supersonic flow error

Question asked by Devin Frohling on May 25, 2016

Hello All! I am currently working with a friend from my school on designing a suppressor for a firearm but while running simulations i've run into an error during the render. I have set my inlet gas velocity to 1000m/s which is the estimated velocity of my projectile that will be fired, and the outlet is set to atmospheric pressure. During render I am being told that "Inlet boundary may conflict with supersonic flow" or something similar. I know this has to be a very simple fix but for the life of me I cannot find a way to fix it. Any help is appreciated.