The thermal conductivity of liquid mixtures at elevated pressures

This paper reports new, absolute measurements of the thermal conductivity of liquid mixtures of n-heptane and isooctane in the pressure range 0.1 to 430 MPa for temperatures of 307.85 and 337.15 K. The results represent a preliminary investigation of the advantages of attempting to describe the isot...

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Bibliographic Details
Published in:International Journal of Thermophysics; (USA) 1989-09, Vol.10 (5), p.1041-1051
Main Authors: FARELEIRA, J. M. N. A, LI, S. F. Y, WAKEHAM, W. A
Format: Article
Language:English
Subjects:
ALKANES
BINARY MIXTURES
CHEMICAL COMPOSITION
Condensed matter: structure, mechanical and thermal properties
CORRELATIONS
DENSITY
DISPERSIONS
Exact sciences and technology
FLUIDS
FUNCTIONS
HARD-SPHERE MODEL
HEPTANE
HIGH PRESSURE
HYDROCARBONS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ISOTHERMS
LIQUIDS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MIXTURES
OCTANE
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
Physics
POLYNOMIALS
PRESSURE DEPENDENCE
RELIABILITY
TEMPERATURE DEPENDENCE
Thermal conduction in nonmetallic liquids
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES 400201 > Chemical & Physicochemical Properties
Transport properties of condensed matter (nonelectronic)
VERY HIGH PRESSURE
WIRES
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Summary:This paper reports new, absolute measurements of the thermal conductivity of liquid mixtures of n-heptane and isooctane in the pressure range 0.1 to 430 MPa for temperatures of 307.85 and 337.15 K. The results represent a preliminary investigation of the advantages of attempting to describe the isothermal composition dependence of the thermal conductivity of liquid mixtures along isochores, rather than isobars as has been traditional. However, no significant differences were found between the composition dependences in the two circumstances, possibly due to the lack of experimental data on the density of these mixtures. The availability of a theoretical description of the isochoric composition dependence suggests that this is the most appropriate description which reinforces the need for further high-pressure measurements of the thermal conductivity and density.
ISSN:0195-928X
1572-9567
DOI:10.1007/BF00503172