VISCOSITY OF WATER AT HIGH PRESSURES AND MODERATE TEMPERATURES

The viscosity of water was measured at pressures from 0 to 1406.2 kg/cm2 gauge and over a temperature range of 2-30° with a rolling ball viscometer. The data obtained show good agreement with most of the previously reported results. Analysis of the viscosity data shows activation energies of viscous flow decreasing in a uniform manner with increasing temperature and pressure and a possible transition phase at 36° and atmospheric pressure, indicated by extrapolated data.