Gas Flow (Help with Physics needed)

[Basel A]

Originally Posted by David Brinza

For starters, you should look up conductance equations and pumping speeds.

There's a simple "flow control" device (an orifice) which will regulate gas flow rates based on pressure differential. Lenox Laser has a wiki providing gas flow control equations. With these equations, you can integrate flow equations (keeping in mind gas laws for pressure, temperature, and volume ) to solve your problem.

Originally Posted by EricVanWyk

This might be useful for a good first pass:

http://gasho.org/rotron%20pages/orif...alculation.htm

Each of these appear to be exactly what I'm looking for, but with different equations. Does the second provide less accurate estimates, or something like that? It looks like the primary difference is the first's inclusion of molecular weight (they mention it's to accommodate gasses other than air; not necessary in this case) and temperature (Is that a major factor? There may be variations of 5-10 Kelvin from room temperature, only about a 2-4% difference).

Originally Posted by AdamHeard

Do you need the precisely correct answer, or a pretty darn close answer? It's not exactly a high school physics kind of problem.

Pretty darn close is more than close enough (within 10% would be good). It certainly isn't high school physics. Honestly, I could just experiment, but I felt learning the calculations would be significantly more beneficial.