Two-phase flow in vertical line
Two-phase flow in vertical line
(OP)
A stream of carbon dioxide gas is injected into a vertical line (probably 10") where water is flow down. The idea is that the water flow will carry/dissolved the carbon dioxide gas with him. I am looking for a correlation that predict the vertical line size so all the gas will derived vertically down with the water and no gas bubbles will traveled up.
Thanks in advance,
Mike
Thanks in advance,
Mike





RE: Two-phase flow in vertical line
But I think that will not guarantee the CO2 gets dissolved. It will only get you bubbles moving down. The rest is contact time, pressure, temperatue, diffusion rate, solubility and resulting pct concentration.
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RE: Two-phase flow in vertical line
If the Froude number is less than 0.31 then bubbles will escape upwards. As you increase the flowrate (and therefore the Froude number) the smaller bubbles will be swept out until you reach a Froude number of 1.0, at which stage you basically have a syphon and all the bubbles are swept down with the water.
For a 10" pipe the water flowrate at this point (i.e. Fr=1.0) would be about 1250 USgpm, or a velocity of 5.1 ft/sec.
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RE: Two-phase flow in vertical line
RE: Two-phase flow in vertical line
If you go with the mechanical, then you'll understimate the amount of CO2. If you use just the solubility, you will over estimate because you can't get to equalibrium without mixing.
The solution would be a "column" with mixers or packing. Then do an absorber calculation.
PS, you'll see a rise in temperature.
RE: Two-phase flow in vertical line
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Two-phase flow in vertical line
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Two-phase flow in vertical line
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