Global thermodynamic behavior of fluids in the critical region

Journal Article · Mon Oct 15 04:00:00 EDT 1990 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.4470· OSTI ID:6161676

Chen, Z Y; Abbaci, A; Tang, S ^[1]; Sengers, J V ^[2]

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1. Institute for Physical Science and Technology, University of Maryland, College Park, MD (USA)
2. Institute for Physical Science and Technology, University of Maryland, College Park, MD (USA) Thermophysics Division, National Institute of Standards and Technology, Gaithersburg, MD (USA)

In a preceding publication (Z. Y. Chen, P. C. Albright, and J. V. Sengers, Phys. Rev. A 41, 3161 (1990)) a procedure for constructing a thermodynamic free energy of fluids was proposed that incorporates crossover from singular behavior at the critical point to regular behavior far away from the critical point. In the present paper this procedure, based on an approximate solution of the renormalization-group theory of critical phenomena, is further extended so that it can be used in conjunction with a six-term classical Landau expansion. The resulting thermodynamic free energy yields a satisfactory representation of the thermodynamic properties of fluids in a large range of temperatures and densities around the critical point, as is demonstrated by a comparison with experimental thermodynamic-property data for carbon dioxide, steam, and ethane.

• DOE Contract Number: FG05-88ER13902
• OSTI ID: 6161676
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 42:8; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKANES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CRITICAL TEMPERATURE
ENERGY
ETHANE
FLUIDS
FREE ENERGY
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STEAM
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE