Measurement of the Viscosity of Liquid Cyclopentane Obtained with a Vibrating Wire Viscometer at Temperatures between (273 and 353) K and Pressures below 45 MPa

The viscosity of liquid cyclopentane has been measured with a vibrating wire viscometer at temperatures from (273 to 353) K at pressures up to 45 MPa with a standard ( k = 1) uncertainty of < 0.7 %. These results differ from literature values by ≤ ± 1 % at T < 313 K. At T > 313 K and p up to 45 MPa, they lie within 1 % from the values obtained by extrapolation of the equation proposed by Assael et al. ( Int. J. Thermophys . 2004, 25, 13−20). We have combined our measurements of viscosity with those reported by Assael and Dalaouti ( High Temp. − High Pressure 2000, 32, 179−184) and Harris et al. ( J. Chem. Eng. Data 2004, 49, 138−142) with densities from the modified Tait equation of Cibulka and Tagaki ( J. Chem. Eng. Data 1999, 44, 1105−1128) to provide a correlation for the viscosity of cyclopentane at temperatures between (219 to 353) K and pressures below 200 MPa that represent the measured values with a standard deviation of ± 0.4 %. Other literature values are compared with this correlation.