IAPWS R17-20
Release on the IAPWS Formulation 2020 for the Viscosity
of Heavy Water
September 2020
PDF of document
Description
This formulation is recommended for the calculation of the viscosity
of heavy water in its fluid phases.
The formulation consists of a dilute-gas term that is only a function of temperature,
a finite-density term as a function of temperature and density, and a
near-critical term as a function of temperature and density.
The near-critical term is negligible except very close to the critical point;
it should be omitted for industrial use and may be omitted for other uses outside
the critical region.
The region of validity the entire stable fluid region from the melting curve
to 775 K at pressures to 100 MPa, to 473 K at pressures up to 200 MPa, and to 373 K at pressures up to 960 MPa.
It extrapolates in a physically reasonable way outside this region.
The development of the formulation and comparisons to
available data are described in detail in a scientific article.
Revision History
- This Release was adopted by IAPWS in 2020, replacing the viscosity portion of the previous heavy water transport properties Release of 1984 (which had most recently been revised in 2007).
This Release is the product of the Working Group "Thermophysical Properties of Water and Steam" (TPWS) of the International Association for the Properties of Water and Steam (IAPWS).
This page updated December 29, 2021
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