Reference Correlations: The laboratory is directly involved through international collaboration in the development of reference correlation for the thermal conductivity and viscosity of fluids over the gas, liquid and critical state. Recent colaboration with Dr Marcia Huber and Dr Richard Perkins (NIST, USA) is gratefully acknowledged. Such correlations are
- Liquid-Gas-Critical phase Thermal Conductivity & Viscosity Correlations
 Hendl S., Millat J., Vogel E., Vesovic V., Wakeham W.A., Luettmer-Strathmann J., Sengers J.V., and Assael M.J. "The Transport Properties of Ethane. I.Viscosity", Int. J. Thermophys. 15:1-31 (1994).
Vesovic V., Wakeham W.A., Luettmer-Strathmann J., Sengers J.V., Millat J, Vogel E., and Assael M.J., "The Transport Properties of Ethane. II.Thermal Conductivity", Int. J. Thermophys. 15:33-66 (1994).
Huber M.L., Perkins R.A., Laesecke A., Friend D.G., Sengers J.V., Assael M.J., Metaxa I.N., Vogel E., Mares R., Miyagawa K. “New International Formulation for the Viscosity of H2O”, J. Phys. Chem. Ref. Data 38:101-126 (2009).
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).
Assael M.J., Koini I., Antoniadis K.D., Huber M., Perkins R., and I.M. Abdulagatov “Reference 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).
Assael M.J., Mihailidou E., Huber M., and Perkins R., “Reference Correlation of the Thermal Conductivity of Benzene from the Triple Point to 1000 K and up to 500 MPa”, J. Phys. Chem. Ref. Data 41, 43102:1-9 (2012).
Assael M.J., Mylona S.K., Huber M., Perkins R., “Reference 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).
Huber M.L., Perkins R.A., Friend D.G., Sengers J.V., Assael M.J., Metaxa I.N., Vogel E., and Miyagawa K., “New International Formulation for the Thermal Conductivity of H2O”, J. Phys. Chem. Ref. Data 41:.033102:1-24 (2012).
Assael M.J., Mylona S.K., Tsiglifisi Ch.A., Huber M., and Perkins R. “Reference Correlation of the Thermal Conductivity of n-Hexane from the Triple Point to 600 K and up to 500 MPa”, J. Phys. Chem. Ref. Data, 42:013106:1-8 (2013).
Assael M.J., Bogdanou I., Mylona S.K., Huber M., and Perkins R. “Reference Correlation of the Thermal Conductivity of n-Heptane from the Triple Point to 600 K and up to 250 MPa”, J. Phys. Chem. Ref. Data, 42:023101:1-9 (2013).
Sykiotii E., Assael M.J., Huber M., and Perkins R. “Reference Correlation of the Thermal Conductivity of Methanol from the Triple Point to 700 K and up to 200 MPa”, J. Phys. Chem. Ref. Data 42:043101:1-10 (2013).
Assael M.J., Sykioti E., Huber M., and Perkins R. “Reference Correlation of the Thermal Conductivity of Ethanol from the Triple Point to 600 K and up to 500 MPa”, J. Phys. Chem. Ref. Data 42:023102:1-9 (2013).
Michailidou E.K., Assael M.J., Huber M., and Perkins R. “Reference Correlation of the Viscosity of n-Hexane from the Triple Point to 700 K and up to 500 MPa”, J. Phys. Chem. Ref. Data 42:033104:1-12 (2013).
Assael M.J., Bogdanou I., Mylona S.K., Huber M., Perkins R., and Vesovic V. “Reference Correlation of the Thermal Conductivity of n-Heptane from the Triple Point to 600 K and up to 250 MPa”, J. Phys. Chem. Ref. Data 42:023101:1-9 (2013).
Assael M.J., Sykioti E.A., Huber M., and Perkins R. “Reference Correlation of the Thermal Conductivity of Ethanol from the Triple Point to 700 K and up to 500 MPa”, J. Phys. Chem. Ref. Data 42:023102:1-9 (2013).
Michailidou E.K., Assael M.J., Huber M., and Perkins R. “Reference Correlation of the Viscosity of n-Hexane from the Triple Point to 600 K and up to 100 MPa”, J. Phys. Chem. Ref. Data 42:033104:1-12 (2013)
Sykioti E.A., Assael M.J., Huber M., and Perkins R., “Reference Correlation of the Thermal Conductivity of Methanol from the Triple Point to 660 K and up to 245 MPa”, J. Phys. Chem. Ref. Data 42:043101:1-10 (2013).
- Publisher’s Note: J. Phys. Chem. Ref. Data 43:019901 (2014) – DOI: 10.1063/1.4848698.
Michailidou E.K., Assael M.J., Huber M., Abdulagatov I., and Perkins R. “Reference Correlation of the Viscosity of n-Heptane from the Triple Point to 600 K and up to 248 MPa”, J. Phys. Chem. Ref. Data 43:023103:1-13 (2014)
Avgeri S., Assael M.J., Huber M.L, and Perkins R.A “Reference Correlation of the Viscosity of Benzene from the Triple Point to 675 K and up to 300 MPa”, J. Phys. Chem. Ref. Data, 43:033103:1-13 (2014)
Vassileiou Chr.-M., Assael M.J., Huber M.L., and Perkins R.A. “Reference Correlations of the Thermal Conductivity of Cyclopentane, iso-Pentane, and n-Pentane from the Triple Point to 700 K and Moderate Pressures”, J. Phys. Chem. Ref. Data 44:033102:1-16 (2015).
Avgeri S., Assael M.J., Huber M., and Perkins R. “Reference Correlation of the Viscosity of Toluene from the Triple Point to 675 K and up to 500 MPa”, J. Phys. Chem. Ref. Data 44:033101:1-16 (2015).
Huber M.L., Sykioti E.A., Assael M.J., and Perkins R.A “Reference Correlation of the Thermal Conductivity of Carbon Dioxide from the Triple Point to 1100 K and up to 200 MPa”, J. Phys. Chem. Ref. Data 45:013102:1-18 (2016).
Huber M.L., Assael M.J., “Correlations for the Viscosity of 2,3,3,3-Tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-Tetrafluoro-propene (R1234ze(E)) ”, Int. J. Refrig. 71:39-45 (2016).
Assael M.J., Koutian A., Huber M.L., Perkins R.A., “Reference Correlations of the Thermal Conductivity of Ethene and Propene ”, J. Phys. Chem. Ref. Data 45:033104:1-13 (2016).
Perkins R.A., Huber M.L., Assael M.J., “Measurements of the Thermal Conductivity of 1,1,1,3,3-Pentafluoropropane (R-245fa) and Correlations for the Viscosity and Thermal Conductivity Surfaces”, J. Chem. Eng. Data 61:3286-3294 (2016).
Koutian A., Assael M.J., Huber M.L., Perkins R.A., “Reference Correlation of the Thermal Conductivity of Cyclohexane from the triple point to 640 K and up to 175 MPa”, J. Phys. Chem. Ref. Data 46:013102:1-8 (2016).
Tsolakidou Ch.M., Assael M.J., Huber M.L., Perkins R.A., Wu J., “Correlations of the Viscosity and Thermal Conductivity of Ethyl Fluoride (R161) ”, J. Phys. Chem. Ref. Data 46:023103:1-12 (2017)
Assael M.J., Papalas T.B., and Huber M.L., “Reference Correlations for the Viscosity and Thermal Conductivity of n-Undecane ”, J. Phys. Chem. Ref. Data 46:033103:1-12 (2017)
Monogenidou S.A., Assael M.J., Huber M.L., “Reference Correlations for the Thermal Conductivity of n-Hexadecane from the Triple Point to 700 K and up to 50 MPa”, J. Phys. Chem. Ref. Data 47:013103:1-8 (2018)
Monogenidou S.A., Assael M.J., Huber M.L., “Reference Correlation for the Viscosity of Ammonia from the Triple Point to 725 K and up to 50 MPa”, J. Phys. Chem. Ref. Data 47:023102¨1-9 (2018).
Monogenidou S.A., Assael M.J., Huber M.L., “Reference Correlation for the Thermal Conductivity of Ammonia from the Triple Point to 680 K and up to 80 MPa”, J. Phys. Chem. Ref. Data 47:043101:1-8 (2018).
Tasidou K., Huber M.L., Assael M.J., “Reference Correlation for the Viscosity of Cyclopentane from the Triple Point to 460 K and up to 380 MPA”, J. Phys. Chem. Ref. Data 48:043101 (2019).
Velliadou D., Antoniadis K.D., Assael M.J., and Huber M.L., "Reference Correlation for the Thermal Conductivity of Xenon from the Triple Point to 610 K and up to 400 MPa", Int. J. Thermophys. 42:51-69 (2021).
Velliadou D., Tasidou K., Antoniadis K.D., Assael M.J., Perkins, R.A., and Huber M.L., "Reference Correlation for the Viscosity of Xenon from the Triple Point to 750 K and up to 86 MPa", Int. J. Thermophys. 42:74-95 (2021). - Erratum: Int. J. Thermophys. 44:56 (2023)
Mebellis M., Velliadou D., Assael M.J., and Huber M.L., "Reference Correlation for the Viscosity of Ethane-1,2-diol (Ethylene Glycol) from the Triple Point to 465 K and up to 100 MPa", Int. J. Thermophys. 42:116-134 (2021).
Mebellis M., Velliadou D., Assael M.J., Antoniadis K.D., and Huber M.L., "Reference Correlation for the Thermal Conductivity of Ethylene Glycol from the Triple Point to 475 K and up to 100 MPa", Int. J. Thermophys. 42:151-168 (2021).
Velliadou D., Antoniadis K.D., Assael M.J., and Huber M.L., "Reference Correlation for the Viscosity of Propane-1,2-diol (Propylene Glycol) from the Triple Point to 452 K and up to 245 MPa", Int. J. Thermophys. 43:42, 1-20 (2022).
Velliadou D., Assael M.J., and Huber M.L., "Reference Correlation for the Viscosity of 1,1,1,2-tetrafluoroethane (R134a) from the Triple Point to 438 K and up to 70 MPa ", Int. J. Thermophys. 43:105-125 (2022).
Velliadou D., Assael M.J., and Huber M.L., "Reference Correlation for the Viscosity of difluoromethane (R32) from the Triple Point to 425 K and up to 70 MPa ", Int. J. Thermophys.43(129):128-136 (2022).
Sotiriadou S., Ntonti E., Velliadou D., Antoniadis K.D., Assael M.J., and Huber M.L., "Reference Correlation for the Viscosity of Ethanol from the Triple Point to 620 K and up to 102 MPa ", Int. J. Thermophys. 40:1-44 (2023). - Erratum: Int. J. Thermophys. 44:46 (2023)
Sotiriadou S.G., Ntonti E., Velliadou D., Assael M.J., and Huber M.L., "Reference Correlations for the Viscosity and Thermal Conductivity of 1-Hexene from the Triple Point to Hight Temperatures and Pressures", Int. J. Thermophys. 44:108 (2023).
Sotiriadou S.G., Ntonti E., Assael M.J., Huber M.L., and Perkins R.A., “Reference Correlation of the Viscosity of Ethene from the Triple Point to 580 K and up to 195 MPa” , Int. J. Thermophys. 45:87-110 (2024).
Sotiriadou S.G., Ntonti E., Assael M.J., Antoniadis K.D., and Huber M.L., “Correlations for the Viscosity and Thermal Conductivity of Tetrahydrofuran ” , Int. J. Thermophys. 45:123 (2024).
Sotiriadou S.G., Ntonti E., Assael M.J., and Huber M.L., “Reference Correlations of the Viscosity and Thermal Conductivity of Acetone from the Triple Point to High Temperatures and Pressures” , Int. J. Thermophys. 46:3 (2025).
Sotiriadou S.G., Assael M.J., and Huber M.L., “Reference Correlation of the Thermal Conductivity of Nitrogen from the Triple Point to High Temperatures and Pressures” , Int. J. Thermophys. (accepted)
Sotiriadou S.G., Assael M.J., and Huber M.L., “Reference Correlation of the Viscosity of Argon from the Triple Point to High Temperatures and Pressures” , Int. J. Thermophys. (to be submitted) .
- Molten metals and saltts Density & Viscosity and Thermal Conductivity Reference Correlations
Assael M.J., Kakosimos K., Bannish M., Brillo J., Egry I., Brooks R., Quested P.N., Mills K.C., Nagashima A., Sato Y., and Wakeham W.A., “Reference Data for the Density and Viscosity of Liquid Aluminium and Liquid Iron”, . Phys. Chem. Ref. Data 35:285-300 (2006).
Assael M.J., Kalyva A.E., Antoniadis K.E., Banish R.M., Egry I., Queste P.N., Wu. J., Kaschnitz E., Wakeham W.A., "Reference Data for the Density and Viscosity of Liquid Copper and Liquid Tin", J. Phys. Chem. Ref. Data 39:033105:1-9 (2010).
Assael M.J., Kalyva A.E., Antoniadis K.E., Banish R.M., Egry I., Wu. J., Kaschnitz E., Wakeham W.A., "Reference Data for the Density and Viscosity of Liquid Antimony, Bismuth, Lead, Nickel and Silver", High Temp. High Press. (in press)
Assael M.J., Armyra I.J., Brillo J., Stankus S., Wu J., Wakeham W.A., “Reference Data for the Density and Viscosity of Liquid Cadmium, Cobalt, Gallium, Mercury, Indium, Silicon, Thallium, and Zinc”, J. Phys. Chem. Ref. Data 41:33101:1-27 (2012).
Assael M.J., Mihailidou E.K., Brillo J., Stankus S., Wu J.T., Wakeham W.A., “Reference Data for the Density and Viscosity of Liquid Eutectic Alloys Al+Si, Pb+Bi. and Pb+Sn”, J. Phys. Chem. Ref. Data, 41: 033103:1-9 (2012)
Assael M.J., Chatzimichailidis A., Antoniadis K.D., Wakeham W.A., Huber M.L., Fukuyama H., “Reference correlations for the thermal conductivity of copper, gallium, indium, iron, lead, nickel and tin”, High Temp. – High Press.46:391-416 (2017).
Assael M.J., Antoniadis K.D., Wakeham W.A., Huber M.L., Fukuyama H., “Reference correlations for the thermal conductivity of liquid bismuth, cobalt, germanium and silicon”, J. Phys. Chem. Ref. Data 46:033101:1-8 (2017)
Chliatzou C., Assael M.J., Antoniadis K.D., Huber M.L., Wakeham W.A., “Reference Correlations for the Thermal Conductivity of 13 Inorganic Molten Salts”, J. Phys. Chem. Ref. Data 47:033104:1-12 (2018).
Tasidou K.A., Mylona S., Chliatzou C., Assael M.J., Antoniadis K.D., Huber M.L., Wakeham W.A., “Reference Correlations for the Viscosity of 13 Inorganic Molten Salts”, J. Phys. Chem. Ref. Data, 48:013101:1-12 (2019).
Tasidou K.A., Magnusson J., Munro T., and Assael M.J., “Reference Correlations for the Viscosity of molten LiF-NaF-KF, LiF-BeF2, and Li2CO3-Na2CO3-K2CO3 ”, J. Phys. Chem. Ref. Data 48:043102:1-10 (2019)
Ntonti E., Sotiriadou S.G., Antoniadis K.D., Assael M.J., Huber M.L., and Wilthan B., “Reference Correlations for the Density and Correlations for the Viscosity of Liquid Titanium, Zirconium, Hafnium, Vanadium, Niobium, Tantalum, Chromium, Molybdenum, and Tungsten” , Int. J. Thermophys. 45:18 (2024).
- High-Viscosity Liquids Reference Correlation
Comuñas M.J.P., Paredes X., Gaciño F., Fernández J., Bazile J.P., Boned C., Daridon J.L., Galliero D.G., Pauly J., Harris K., Assael M.J., and Mylona S.K., “Reference Correlation of the Viscosity of Squalane from 273 to 373 K at 0.1 MPa”, J. Phys. Chem. Ref. Data 42:033101:1-6 (2013).
Mylona S.K., Assael M.J., Comunas M.J.P., Paredes X., Gacino F.M., Fernandez J., Bazile J.P., Boned C., Daridon J.L., Galliero G., Pauly J., and Harris K., “Reference Correlation for the Density and Viscosity of Squalane from 273 to 473 K at pressures up to 200 MPa”, J. Phys. Chem. Ref. Data 43: 013104:1-11 (2014).
- Liquid-phase Viscosity Reference Correlation
Santos F.J.V., Nieto de Castro C.A., Dymond J.H., Dalaouti N.K., Assael M.J., Nagashima A., “Standard Reference Data for the Viscosity of Toluene”, J. Phys. Chem. Ref. Data 35:1-8 (2006).
Assael M.J., Avelino H.M., Dalaouti N.K., Fareleira J.M.N.A., and Harris K., "Reference Data for the Viscosity of Toluene over a wide Range of Pressures", Int. J. Thermophys. 22:789-799 (2001).
Assael M.J., Bauer H., Dalaouti N.K. and Harris K.R., "Reference Correlation for the Viscosity of Liquid Cyclopentane from 220 to 310 K at Pressures up to 25 MPa", Int. J. Thermophys. 25:13-20 (2004).
- Gas-phase Thermal Conductivity Reference Correlation
Assael M.J. Mixafendi S., and Wakeham W.A., "The Viscosity and Thermal Conductivity of Hydrogen in the Limit of Zero-Density", J. Phys. Chem. Ref. Data 15:1315-1322 (1986).
Assael M.J., Mixafendi S., and Wakeham W.A., "The Viscosity of Normal Deuterion in the Limit of Zero-Density", J. Phys. Chem. Ref. Data 16:189-192 (1987).
- Liquid-phase Thermal Conductivity Reference Correlation
Ramires M.L.V., Nieto de Castro C.A., Nagasaka Y., Nagashima A., Assael M.J., and Wakeham W.A., "Standard Reference Data for the Thermal Conductivity of Water", J. Phys. Chem. Ref. Data 24:1377-1381 (1995).
Ramires M.L.V., Nieto de Castro C.A., Perkins R.A., Nagasaka Y., Nagashima A., Assael M.J., and Wakeham W.A., "Reference Data for the Thermal Conductivity of Saturated Liquid Toluene over a wide Range of Temperatures", J. Phys. Chem. Ref. Data 29:133-139 (2000).
Assael M.J., Ramires M.L.V., Nieto de Castro C.A., and Wakeham W.A., "Benzene. A Further Liquid Thermal Conductivity Standard", J. Phys. Chem. Ref. Data. 19:113-117 (1990)
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