Unified approach to correlating the viscosities of H2O and D2O in the liquid and gaseous phases

N. Matsunaga, M. Hori and A. Nagashima

Physica A: Statistical Mechanics and its Applications, 1989, vol. 156, issue 1, 547-569

Abstract: Unified correlation for the thermophysical properties of H2O and D2O is useful for studying the isotope effects, for checking the consistency of available data and also for predicting the properties of other H2O isotopes. A unified approach has been studied in the present paper for correlating the viscosities of H2O and D2O both in the liquid and gaseous phases. The analysis of the experimental viscosity data revealed that the simple corresponding states principle held only for the excess viscosity Δη=η-η0(T) at the reduced densities ρr=ρρc⪅1.5. Therefore, a functional form (T,ρ)=η0(T)+Δη(T,ρ) has been adopted for the correlating equation and the excess term Δη(T,ρ) at ρr⪅1.5 has been generalized between H2O and D2O. In the density range ρrGap;1.5, the equation has been based only on the H2O data and the interpretation of the isotope effect has been tried by using the extended corresponding states principle. The applicability of the present equation to the estimation of the viscosity of T2O is also discussed.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:156:y:1989:i:1:p:547-569

DOI: 10.1016/0378-4371(89)90140-4

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