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   Hard-Spere Model  



TRANSPORT PROPERTIES ESTIMATION PACKAGE
V.1.2 LIQUID PHASE, UP TO 1000 BARS PRESSURE

(Based on Considerations of the Hard-Sphere Model)

John H. Dymond
Chemistry Department, Glasgow University, G128QQ Glasgow, UK
&
Marc J. Assael
Chemical Engineering Faculty, Aristotle University, Thessaloniki, Greece

TransP calculates the thermal conductivity, viscosity and density
of liquid hydrocarbons (C1-C16), alcohols (C1-C10), refrigerants (old & new) and other liquids
as well as of mixtures of hydrocarbons or alcohols
at pressures up to 1000 Atmospheres.

Its uncertainty is, 5% for the thermal conductivity and viscosity and 0.2% for the density.
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A lot of work is carried out in correlating transport properties of liquids. During the last two decades an in cooperation with Prof. J.H. Dymond (Glasgow University, UK) a scheme based upon hard-sphere considerations has successfully been applied to the correlation and prediction of the viscosity, thermal conductivity of pure liquids under pressure. The scheme has succesfully been expanded to the prediction of the transport properties of mixtures of homologous series, as well as for the prediction of the viscosity of supercritical fluids and mixtures. The resulting equations have been incorporated in the computer package TransP.
In the Dymond-Assael hard sphere scheme employed for the prediction of the transport properties of liquids, it is imperative to employ very accurate values of the density, as the scheme is very sensitive to them. In measurements also, especially in the liquid viscosity ones, good density values are required.

Density values have thus been collected and corelated (usually in a Tait-type equation), for the hydrocarbons, the alcohols and the refrigerants.



In the case of mixtures, the Vesovic-Wakeham algorythm has been employed together with the Dymond-Assael hard-sphere scheme producing very promissing results.

   Selected papers  


  • Selected Papers on Correlation/Prediction of Transport Properties 

Assael M.J., Gialou K.E, and Dalaouti N.K., "Viscosity and Thermal Conductivity of Methane, Ethane and Propane Halogenated Refrigerants", Fluid Phase Equil. 174:203-211 (2000).
Assael M.J., Dalaouti N.K., Dymond J.H., and Feleki E.P., "The Viscosity and Thermal Conductivity of Liquid Halogenated Ethane Refrigerants", Int. J. Thermophys. 21:367-375 (2000).
Assael M.J., Dalaouti N.K., Griva A.A., and Dymond J.H., "Viscosity and Thermal Conductivity of Halogenated Methane and Ethane Refrigerants", Int. J. Refrig. 22:525-535 (1999).
Assael M.J., Dymond J.H. and Polimatidou S.K., "Correlation and Prediction of Dense Fluid Transport Coefficients. VII. Refrigerants ", Int.J.Thermophys. 16:761-772 (1995).
Assael M.J., Dymond J.H. and Polimatidou S.K., "Correlation and Prediction of Dense Fluid Transport Coefficients - VI. Alcohols ", Int.J.Thermophys. 15:189-201 (1994).
Assael M.J., Dymond J.H., Papadaki M. and Patterson P.M., "Correlation and Prediction of Dense Fluid Transport Coefficients - V. Aromatic Hydrocarbons", Int.J.Thermophys. 13:895-905 (1992)
Assael M.J., Dymond J.H., and Patterson P.M., "Correlation and Prediction of Dense Fluid Transport Coefficients - IV. A Note on Diffusion", Int.J.Thermophys. 13:729-733 (1992).
Assael M.J., Dymond J.H., Papadaki M. and Patterson P.M., "Correlation and Prediction of Dense Fluid Transport Coefficients - III. n-Alkanes Mixtures", Int.J.Thermophys. 13:659-669 (1992).
Assael M.J., Dymond J.H., Papadaki M. and Patterson P.M., "Correlation and Prediction of Dense Fluid Transport Coefficients - II. Simple Molecular Fluids", Fluid Phase Equil. 75:245-255 (1992).
Assael M.J., Dymond J.H., Papadaki M. and Patterson P.M., "Correlation and Prediction of Dense Fluid Transport Coefficients - I.n-Alkanes", Int.J.Thermophys. 13:269-281 (1992).


  • Selected Papers on Correlation/Prediction of Density 

Assael M.J, Dymond J.H and Exadaktilou D., "An Improved Representation of the Density of Liquid n-Alkanes", Int.J.Thermophys. 15:155-164 (1994).


  • Selected Papers on Correlation/Prediction of Mixtures 

Assael M.J., Oliveira C., Wakeham W.A. "Towards the Viscosity of Refrigerant/Oil Mixtures", Fluid Phase Equil. 210:5-19 (2003).
Assael M.J., Dalaouti N.K., and Metaxa I., "On the Correlation of Transport Properties of Liquid Mixtures", Fluid Phase Equilibria 199:237-247 (2002).
Assael M.J., Dalaouti N.K. and Wakeham W.A., "Prediction of the Viscosity of Liquid Mixtures", Int. J. Thermophys. 22:1727-1737 (2001).
Assael M.J. and Dalaouti N.K., "The Thermal Conductivity of Toluene + Cyclopentane Mixtures: Measurements and Prediction", Int. J.Thermophys. 22:659-678 (2001).
 

Index

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