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A priori determination of the region of the three physical volume root loci in the Perturbed-Chain SAFT EOS

Alsaifi, Nayef M. and Al Aslani, Isa and Binous, Housam and Wang, Zhen-Gang (2017) A priori determination of the region of the three physical volume root loci in the Perturbed-Chain SAFT EOS. Fluid Phase Equilibria, 434 . pp. 152-166. ISSN 0378-3812. https://resolver.caltech.edu/CaltechAUTHORS:20170301-153738586

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Abstract

In this work, the physical region exhibiting the common three volume roots is located a priori for the Perturbed-Chain Statistical Association Fluid Theory (PC-SAFT) equation of state without the need to determine the other non-physical volume roots. The loci of all multiple volume roots are first determined and investigated for the PC-SAFT equation of state over a broad range of temperatures and pressures using bifurcation diagrams. The study then illustrates how the number of multiple volume roots varies with temperature and pressure. The influence of each SAFT term is studied for several kinds of fluids ranging from spherical molecules to polymers. The technique presented in this study provides a simple method to identify artificial two-phase separation regions. Our study demonstrates that the problem of multiple volume roots found in non-cubic equations of state can be easily managed once the variation of volume loci with temperature and pressure are analyzed and understood using bifurcation diagrams.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.fluid.2016.11.023DOIArticle
http://www.sciencedirect.com/science/article/pii/S0378381216305775PublisherArticle
ORCID:
AuthorORCID
Wang, Zhen-Gang0000-0002-3361-6114
Additional Information:© 2016 Elsevier B.V. Received 28 September 2016, Revised 12 November 2016, Accepted 24 November 2016, Available online 26 November 2016.
Subject Keywords:Equation of state; PC-SAFT; Bifurcation diagrams; Volume roots
Record Number:CaltechAUTHORS:20170301-153738586
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170301-153738586
Official Citation:Nayef M. Alsaifi, Isa Al Aslani, Housam Binous, Zhen-Gang Wang, A priori determination of the region of the three physical volume root loci in the Perturbed-Chain SAFT EOS, Fluid Phase Equilibria, Volume 434, 25 February 2017, Pages 152-166, ISSN 0378-3812, http://dx.doi.org/10.1016/j.fluid.2016.11.023. (http://www.sciencedirect.com/science/article/pii/S0378381216305775)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74659
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Mar 2017 03:36
Last Modified:03 Oct 2019 16:41

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