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

Viscosity measurements have been carried out with a falling-cylinder instrument in the compressed liquid and supercritical regions 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 pressure...

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Bibliographic Details
Published in:International journal of thermophysics 2011-05, Vol.32 (5), p.925-941
Main Authors: Laesecke, Arno, Bair, Scott
Format: Article
Language:English
Subjects:
Classical Mechanics
Compressed
Computational fluid dynamics
Condensed Matter Physics
Extrapolation
Fluid flow
Fluids
Industrial Chemistry/Chemical Engineering
Liquids
Physical Chemistry
Physics
Physics and Astronomy
Viscosity
Viscosity measurement
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Summary:Viscosity measurements have been carried out with a falling-cylinder instrument in the compressed liquid and supercritical regions 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 3.5 % for viscosity, the greater of 1 MPa or 0.5 % for pressure, and 0.4 K for temperature, the new results can be used to reconcile inconsistencies between literature data sets. They also provide 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.
ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-011-0978-y