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Calculation of the Phase Diagram of N-Alkanes (Cnh2n+2) by the Landau Mean Field Theory

dc.authorid Yurtseven, Hasan Hamit/0000-0002-7745-6490
dc.authorscopusid 9334413200
dc.authorscopusid 56512407500
dc.authorwosid Yurtseven, Hasan/Aba-9994-2020
dc.contributor.author Yurtseven, H.
dc.contributor.author Dogan, E. Kilit
dc.date.accessioned 2025-05-10T17:37:02Z
dc.date.available 2025-05-10T17:37:02Z
dc.date.issued 2022
dc.department T.C. Van Yüzüncü Yıl Üniversitesi en_US
dc.department-temp [Yurtseven, H.] Middle East Tech Univ, Dept Phys, TR-06531 Ankara, Turkey; [Dogan, E. Kilit] Yuzuncu Yil Univ, Dept Phys, TR-65080 Van, Turkey en_US
dc.description Yurtseven, Hasan Hamit/0000-0002-7745-6490 en_US
dc.description.abstract We study the temperature T and concentration n (number of carbon atoms) dependence on the transitions of the liquid, rotator (R-I, R-II, R-III, R-IV and R-V) and crystal phases in n-alkanes (CnH2n+2). The Landau phenomenological model is used by expanding the free energy in terms of the lattice distortion parameter (D) and the tilt angle (theta) of the rotator (and crystal) phases with their quadratic coupling (D-2 theta(2)). The phase line equations are obtained with some approximations by considering the first order transitions between the phases in n-alkanes. By assuming the temperature and concentration dependence of some parameters in the Landau mean field expansion, the T-n phase diagram is established by using the observed data from the literature. Our results are satisfactory to explain the first order transition between the phases, mainly for the rotator and crystal phases in n-alkanes (CnH2n+2). The T-n phase diagrams can also be obtained for some other compounds of similar structures by the Landau phenomenological model as given in this study. (C) 2022 Elsevier B.V. All rights reserved. en_US
dc.description.woscitationindex Science Citation Index Expanded
dc.identifier.doi 10.1016/j.fluid.2022.113377
dc.identifier.issn 0378-3812
dc.identifier.issn 1879-0224
dc.identifier.scopus 2-s2.0-85122635649
dc.identifier.scopusquality Q2
dc.identifier.uri https://doi.org/10.1016/j.fluid.2022.113377
dc.identifier.uri https://hdl.handle.net/20.500.14720/14252
dc.identifier.volume 556 en_US
dc.identifier.wos WOS:000821929500009
dc.identifier.wosquality Q2
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.subject Phase Diagram en_US
dc.subject Landau Phenomenological Model en_US
dc.subject N-Alkanes en_US
dc.subject Cnh2N+2 en_US
dc.title Calculation of the Phase Diagram of N-Alkanes (Cnh2n+2) by the Landau Mean Field Theory en_US
dc.type Article en_US

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