Viscosity of Gaseous D₂O at High Pressures

Abstract

Viscosity of D₂O in the gaseous region up to 400°C and 300 bar was measured with the aid of a capillary viscometer. Existence of a negative pressure gradient at subcritical temperature was experimentally and quantitatively confirmed. Measured results of the viscosity on five isotherms were correlated into a simple empirical equation.