THERMAL CONDUCTIVITY OF HEAVY WATER (D,O)

Existing thermal conductivity (A) data for heavy water (DzO) between 0 and 600°C at pressures from atmospheric to 1000 bar are correlated as simple functions of reduced pressure and temperature, utilizing orthogonal polynomial least squares analysis. Correla-tions in the vapour and supercritical states are made from a knowledge of the ratio A,,,/AR,o. A table of best values for the liquid, vapour and supercritical states of the pure fluid is also provided. Using these values, the thermal conductivity of heavy water can be estimated to between &2 per cent and &lo per cent from values of pressure and tem-perature only