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High Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane



Arno R. Laesecke, Scott Bair


Viscosity measurements have been carried out with a falling-cylinder instrument in the compressed liquid and supercritical region of the hydrofluorocarbon 1,1,1,2-tetrafluoroethane (R134a). A highly pure sample was used. The measurement region at temperatures from 293.15 K to 438.15 K with pressures from 10 MPa to 400 MPa extends the existing data range substantially. With estimated uncertainties of 3 % for viscosity, 1 MPa for pressure and 0.7 K for temperature the new results allow to reconcile inconsistencies between literature data sets. They provide also a test of the extrapolation capability of existing viscosity correlations for this fluid and enable the development of a more accurate and wider ranging formulation.
International Journal of Thermophysics


1, 1, 1, 2-tetrafluoroethane, Compressed liquid, Falling-body viscometer, High pressure, n-octane, R134a, Supercritical, Viscosity


Laesecke, A. and Bair, S. (2011), High Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane, International Journal of Thermophysics, [online], (Accessed April 14, 2024)
Created April 27, 2011, Updated February 19, 2017