Hi. Im starting to learn flow simulation trying to simulate known systems to me in order to be able to compare the sim result with my observation in real life. I have this case: it is a mixing chamber: it mixes air and pure O2. It takes air from the inlet, and there through a little tube pue O2 is inyected . a compressor takes this mix at the outlet. The compresor sucks 280 lts/min

But Im not being able to simulate, I guess Im not defining the inlets and outlets correctly? I have ataches an image of how the mixer is modelled in solidworks.

description:

1 is the pure o2 inyector inlet. Oxygen is inyected at a flow of 1 lts/min

2 is the air inlet. It is just an open space here air gets into the system.

3 is the oulet where the compressor hose is conected. compressor takes 280 lts/min

I have defined 3 boundary conditions:

1 O2 inyector is defined as a INLET VOLUME FLOW with a value of **1.6666666666667E-5** m3/min

2 is defined as a PREESURE OPENING > enviroment pressure with a value of 760 mm Hg

and 3 is defined as a OUTLET VOLUME FLOW with a value of 0.00466667 m^3/s

But Im not getting a simulatin here... are the boundaries properly configured?

Also, I have a question: I would like to know the mix % of the gas mix in different points of the mixing chamber, for example, I would like to know near area 3 if the gas there is well mixed, I know that at the outlet I should get an enriched air gas, containing 70% of nitrogen and something between 22 and 35 % of oxigen, how can I measure this at point 3?

Than ks in advance for the help

To address the last portion os your post: you can extract mass fraction in a cut plot, please watch this https://www.youtube.com/watch?v=ZVnkVXKOW_Y

SOLIDWORKS Flow Simulation 2014 CFD Demo – Fluid Mixing Flow Analysis - YouTube

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