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New International Formulation for the Viscosity of H2O



Marcia L. Huber, Richard A. Perkins, Arno R. Laesecke, Daniel G. Friend, Jan V. Sengers, Marc J. Assael, Ifigenia N. Metaxa, Eckhard Vogel, Radim Mares, Kiyoshi Miyagawa


The International Association for the Properties of Water and Steam (IAPWS) encouraged an extensive research effort to update the IAPS Formulation 1985 for the Viscosity of Ordinary Water Substance, leading to the adoption of a Release on the IAPWS Formulation 2008 for the Viscosity of Ordinary Water Substance. This manuscript describes the development and evaluation of the 2008 formulation, which provides a correlating equation for the viscosity of water for fluid states up to 1173 K and 1000 MPa with uncertainties from less than 1 % to 7 % depending on the state point.
J. Phys. & Chem. Ref. Data (JPCRD) -


IAPWS, viscosity, water


Huber, M. , Perkins, R. , Laesecke, A. , Friend, D. , Sengers, J. , Assael, M. , Metaxa, I. , Vogel, E. , Mares, R. and Miyagawa, K. (2009), New International Formulation for the Viscosity of H2O, J. Phys. & Chem. Ref. Data (JPCRD), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 27, 2024)


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Created April 21, 2009, Updated June 2, 2021