Accession Number : ADD095479

Title :   Problems with the Prandtl Number of Steam,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Sengers, J V ; Basu, R S ; Kamgar-Parsi, B ; Kestin, J

Report Date : May 1982

Pagination or Media Count : 4

Abstract : Two internationally agreed upon formulations for the thermodynamic properties of steam are currently in existence: the 1967 IFC Formulation for Industrial Use (IFC 67) and the 1968 Formulation for Scientific and General Use (IFC 68). The first international formulation for the transport properties, the viscosity, and the thermal conductivity, was adopted in 1964. However, it soon became apparent that this formulation had serious shortcomings. Accordingly, IAPS initiated work toward a new formulation for the transport properties of steam, which led to the adoption of the Release on Dynamic Viscosity of Water Substance in 1975 (RDV 75) and of the Release on Thermal Conductivity of Water Substance in 1977 (RTC 77). This new formulation for the transport properties has been incorporated in the fourth edition of the ASME Steam Tables. RTC 77 contains, in fact, two equations for the thermal conductivity of water and steam: an interpolating equation for industrial use and an interpolating equation for scientific use.

Descriptors :   *PRANDTL NUMBER, *STEAM, *THERMODYNAMIC PROPERTIES, FORMULAS(MATHEMATICS), TRANSPORT PROPERTIES, VISCOSITY, THERMAL CONDUCTIVITY, WATER, EQUATIONS, DENSITY, PRESSURE, SPECIFIC HEAT, EQUATIONS OF STATE

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE