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Cubic EoS - only VAPOR root is converging o_o

by maistral
Tags: converging, cubic, root, vapor
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Mar16-14, 02:48 AM
P: 78
Hello. I would like to inquire as to how to deal with the said topic title.

I'm trying to generate a VLE graph for ethylene oxide-water. While I know that EO will quickly vaporize since the boiling point of EO is quite low, I'm still trying to generate a VLE using SRK.

So while the vapor root is converging, the liquid root won't.

Upon inspection (and using taylor expansion of the third degree to simplify the equation), I noticed that the two roots (the liquid root and the useless middle root) converge in the complex domain. Does this have a physical meaning?
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Greg Bernhardt
May4-14, 10:14 PM
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I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?

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