phdinfunk

The thing is, in my original question I asked how to set up the problem. Had that been shown, I could easily solve for any number of situations. But I don't even know how the units and formulas interact here. Is it an irreversible pressure drop equation? How do my units need to be set up? I've never seen one of these problems worked out before. If I've left out a variable, then please help me set up the equations and show me the space where I didn't specify. THAT would constitute a very good answer to the question. So, without anyone having suggested any useful equation, as I'm looking at the formulas I can find, it looks like fluid dynamics requires an aperture size. 2mm.

Wow, I see a lot of activity on my post! I understand what you're saying in the analogy you're trying to make. But with a circuit, you will always end up with a loop, and every node is going to obey Kirchoff's laws. If you ain't got a loop, you can't really start talking about electronics. With my original question: The resistance load is that I specified dumping the cylinder into atmospheric pressure. Or if I had specified a vacuum, that would have been a different resistance to the flow. So, if I've got the single stage regulator, what is going to create the initial flow rate of 15 L / minute?

So, I'm an electronics guy and this problem has me stumped. If there's a cylinder of gas at 150 Bar, and I have a regulator on that cylinder. I'm pumping gas from 150 Bar to Atmospheric Pressure. What pressure does the regulator need to be set at in order to get 15 Liters per minute as my flow rate? I'm not even sure exactly how to set up this problem. It's a bit embarrassing, but it got me on this forum. Thanks! PS: Also, just so we can add some extra calculus here: Assuming a single-stage regulator, at what rate would my flow rate drop off as gas is being released? I love a chance to use second derivatives. So, again assuming a single-stage regulator, after half an hour, what would the new flow rate be, of my 16 Liter tank which was originally at 150 Bar pressure and set for 15L per minute? PPS: REALLY, thanks for the help.