Reference Correlation for the Viscosity of Difluoromethane (R-32) from the Triple Point to 425 K and up to 70 MPa
Danai Velliadou, Konstantinos Antoniadis, Marc Assael, Marcia L. Huber
We present a new wide-ranging correlation expressed in terms of temperature and density for the viscosity of difluoromethane (R-32) based on critically evaluated experimental data. The correlation is designed to be used with an existing equation of state from the triple point to 425 K and at pressures up to 70 MPa. Comparisons with experimental data over the temperature range 220 to 425 K at pressures up to 70 MPa indicate the correlation has an estimated uncertainty (at the 95% confidence level) of 3.4% in this region, and 2% for the vapor at atmospheric pressure. The correlation also behaves in a physically reasonable manner and may be extrapolated up to 350 MPa, but caution is advised in this region since it requires extrapolation of the equation of state.
, Antoniadis, K.
, Assael, M.
and Huber, M.
Reference Correlation for the Viscosity of Difluoromethane (R-32) from the Triple Point to 425 K and up to 70 MPa, International Journal of Thermophysics, [online], https://doi.org/10.1007/s10765-022-03050-9, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934726
(Accessed August 12, 2022)