Accession Number : AD0783527

Title :   Gas Properties Computational Procedure Suitable for Electronic Calculators.

Descriptive Note : Technical rept.,


Personal Author(s) : Andrews,J. R. ; Biblarz,O.

Report Date : 01 JUL 1974

Pagination or Media Count : 88

Abstract : A calculating procedure is presented, based on a least squares polynomial approximation, for duplicating existing tabular values of selected thermodynamic and transport properties of various important gases. Most of the data refer to ideal gases; however, for functions of both temperature and pressure, the pressure has been specified such that the polynomial approximations have only temperature as the independent variable. Suggested algorithms for polynomial evaluations up to the sixth degree are presented and optimized for hand-held or desk top calculators. Using the suggested polynomial fits and a suitable calculator, it is possible to duplicate existing table values for the various functions of the selected gases without interpolation or reference to the tables per se. The error of the included fits its generally less than 0.5%. (Modified author abstract)

Descriptors :   *Gases, *Thermodynamics, *Transport properties, *Data reduction, Polynomials, Temperature, Pressure, Mathematical models, Computations, Correlation techniques, Enthalpy, Entropy, Thermal conductivity, Viscosity, Specific heat, Algorithms

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE