Recent content by Innovine

Thanks for helping me out and putting up with my frustrations!

Ok, thanks. I have T constant for the moment. It looks like my valve simulation is working, I can see the mass move, and the pressure stabilizes to the same values in two linked tanks, taking longer to stabilize as the pressure differental decreases. No idea if its realistic or not, but neither...

Understood. Did you have a version of the formula with discharge coefficient, for non-choked flows? And out of morbid curiosity, how complex do things get if I wanted to include heat, in a very, very, very approximate way?

I mentioned the hole size of 0.001m^2 in posts #28, #30 AND #32. No, the reason the user does anything is irrelevant, the nozzle parameters and pressure determines the flow. .. oh so the PROGRAM I use now determines the venting time?? You are just inventing problems now. If you go all the...

Of course there is, can you just give me a number. I told you the area. If I drill a hole and uncork it, gas will come out. Will it take 2 seconds or 2 minutes to empty? Its getting kind of frustrating that you keep saying stuff like "to set the nozzle, pick a time to empty" and I ask "ok, what...

Thanks JBA, you're a great help. I am using Cd and the formula you linked to earlier, yep. Is there a non-choked version also? The thing with picking nozzles is, when you say adjust the nozzle to get the target venting time, I don't know what a reasonable venting time value actually is, to...

I took a go at implementing this today and it went pretty well I think. I'm keeping T constant for now. I have run into one big unknown regarding the discharge coefficient. This doesn't have to be all that precise, but still, what ballpark number should I put in here? For example, if I have an...

I'm going to try implementing some of this today, and that should help me get my head around it, as well as raise a few more concrete questions.

I have a little problem there with selecting a final temperature, since I don't know when the player may close the valve. But I'll go have a play aroundewith this now and see what I can come up with, thanks!

Understood, thanks, and I really am starting to get somewhere now at last. I found the equation with K here:https://en.wikipedia.org/wiki/Flow_coefficient Now this is something I would be completely prepared to fake! What might a heat transfer value have for a value?`This part of the system is...

Thanks, but why not the formula I found?

This is where I am now: I can simplify my problem to a single pressurized tank, with a valve to vent the contents to a vacuum. Using the ideal gas law, I am able to calculate the pressure in my tank given an initial temperature. Now I next turn to the valve, and have found an equation for flow...

Thanks, but I am not even able to see what you're referring to, never mind make any sense of it. While there's no doubt very useful information in that thread, I think I'm in need of MUCH more basic help.

Unfortunately that's way beyond my ability...