Reference Correlation of the Viscosity of Ethene from the Triple Point to 450 K and up to 195 MPa

Abstract

We present a new wide-range correlation for the viscosity of ethene based on critically evaluated experimental data. The viscosity correlation is valid from the triple point to 450 K and up to 195 MPa. The average absolute percentage deviation of the fit for the primary data (including the critical region) is 1%, with a bias of 0.2%, The estimated uncertainty of the correlation in the gas and supercritical phases at pressures up to 195 MPa is 2.5% (at the 95% confidence level). For the dilute gas (pressures up to 0.1 MPa) in the temperature range 296 K to 450 K, the uncertainty is 0.5%. For the liquid phase at pressures up to 5.5 MPa the estimated uncertainty is 5.3%. The correlation includes a term for the critical enhancement that is significant only in a very narrow region very close to the critical point. It is less than 1% outside of the region around the critical point from 279.80 K ≤ T ≤ 290.27 K to 140.79 kg⋅m⁻³ ≤ ρ ≤ 293.08 kg⋅m⁻³.