Determine the headloss coefficient of the escape path and grab a pencil.
Yeah, what Roland said.
dP/dt = (RT/V)*dN/dt
For first order accuracy, you can probably put the density halfway between the tank and the atmosphere.
Integrate from P= P0 to P=0
Also, there is almost certainly a mistake in my math, but you can figure out the actual answer.
SolidWorks Flow Simulation has a tank evacuation feature.
I used it only once. I think you will find it in Tools-> calculator.
Carl, are you on subscription? i'd suggest taking a look at S-056539 and S-032465. that talk about this type of analysis.
looks like it can be done. transient analysis, setup the appropriate initial conditions, i tested with an internal analysis but i think i'd use a transient analysis instead. i didn't realize that flow would let you run an analysis with only 1 boundary condition. i swear that it didn't let you do that in the past.