Project Details:

Reference Correlations for the Thermal Conductivity and Viscosity of Fluids over Extended Range of Conditions (vapor, liquid and supercritical region)

The aim of the project is to develop reference correlations for the thermal conductivity and the viscosity of fluids over extended temperature and pressure ranges including vapor, liquid and supercritical region.

In the case of thermal conductivity we will expand upon a procedure already employed through existing cooperation between our laboratories. This collaboration resulted in the successful correlation of the thermal conductivity surfaces of H₂, p-H₂, SF₆ and toluene.

In the case of the viscosity, a new but similar procedure will be developed.

Test cases will be benzene, heptane, hexane, and pentane for thermal conductivity and toluene, benzene and hexane for viscosity.

The procedure will begin with a comprehensive literature search utilizing all available means. All measurements ever been done will be collected, placed in a database and critically evaluated according to an IUPAC established set of criteria. The data will hence be separated into primary and secondary sets. The primary data will be used to develop the correlation and the secondary data will be used only for comparison purposes. The transport property will be comprised of three contributions:

1.  The limit of zero density
2.  The residual contribution
3. The critical region (thermal conductivity only)

The zero density limit will be correlated based on kinetic theory and critically evaluated data. The critical region for thermal conductivity will incorporate the theory of Olchowy and Sengers, while the residual contribution will be dealt with empirically as a function of temperature and density.

It should be noted that for the aforementioned fluids adequate equations of state available to provide density.

This procedure has successfully been employed for the correlation of the thermal conductivity of H₂ [1], p-H₂ [1], SF₆ [2], and toluene [3].

 

References

[1] Assael M.J., Assael I.-A.M., Huber M., Perkins R., Takata Y., “Correlation of the Thermal Conductivity of Normal and Parahydrogen from the Triple Point to 1000 K and up to 100 MPa”, J. Phys. Chem. Ref. Data  40:033101:1-13 (2011).

[2] Assael M.J., Koini I., Antoniadis K.D., Huber M., Perkins R., and I.M. Abdulagatov “Correlation of the Thermal Conductivity of Sulfur Hexafluoride from the Triple Point to 1000 K and up to 150 MPa”, J. Phys. Chem. Ref. Data  41:023104:1-9 (2012)

[3] Assael M.J., Mylona S.K., Huber M., Perkins R., “Correlation of the Thermal Conductivity of Toluene from the Triple Point to 1000 K and up to 1000 MPa”, J. Phys. Chem. Ref. Data  41:023101:1-12 (2012).

• Perkins, Richard

• Assael, Marc
• Huber, Marcia