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	On the existence of a third-order phase transition beyond the Andrews critical point: A molecular dynamics study
	Wang, Han ; Delle Site, Luigi ; Zhang, Pingwen
	2011
关键词	LENNARD-JONES FLUID X-RAY-SCATTERING SUPERCRITICAL FLUIDS DENSITY-FLUCTUATIONS INHOMOGENEITY COEXISTENCE BEHAVIOR STATES
英文摘要	The possibility of the existence of a gas-liquid third order phase transition for fluids is becoming a subject of growing interest. Experimental work suggests its existence for specific systems while recent theoretical models claim its universality. In this work, we employ Molecular Dynamics and investigate the third-order phase transition beyond the Andrews critical point by treating a system of Lennard-Jones particles along three isotherms. Two partial derivatives of the Gibbs free energy are measured, namely the molar constant pressure heat capacity and isothermal compressibility. The convergence of these simulations with respect to the system size as well as the cut-off radius is carefully checked. The obtained results show that partial derivatives certainly do not present sharp cusp singularities at the maxima, and actually suggest that there are no singularities at all. On these basis we then conclude that a third-order phase transition in the considered temperature region: T* >= 1.36 may indeed not exist. (C) 2011 American Institute of Physics. [doi:10.1063/1.3666848]; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000298250600030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Physics, Atomic, Molecular & Chemical; SCI(E); EI; PubMed; 4; ARTICLE; 22; 224506; 135
语种	英语
出处	EI ; PubMed ; SCI
出版者	journal of chemical physics
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/157237]
专题	数学科学学院
推荐引用方式 GB/T 7714	Wang, Han,Delle Site, Luigi,Zhang, Pingwen. On the existence of a third-order phase transition beyond the Andrews critical point: A molecular dynamics study. 2011-01-01.

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