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Fluid: A Numerical Interpolation Procedure for Obtaining Thermodynamic and Transport Properties of Fluids
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
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A computer-program subroutine, FLUID, has been developed to calculate thermodynamic and transport properties of pure fluid substances. It provides for determining the thermodynamic state from assigned values for temperature- density, pressure-density, temperature-pressure, pressure-entropy, or pressure- enthalpy. FLUID considers liquid or two-phase liquid-gas conditions as well as the gas phase. A van der Waals model is used to obtain approximate state values these values are then corrected for real-gas effects by model-correction factors obtained from tables based on experimental data. Saturation conditions, specific heat, entropy, and enthalpy data are included in the tables for each gas. Since these tables are external to the FLUID subroutine itself, FLUID can implement any gas for which a set of tables has been generated. A setup phase is used to establish pointers dynamically to the tables for a specific gas. Data-table preparation is described. FLUID is available in both SFTRAN and FORTRAN. Thermodynamic properties, Thermophysical properties, Real gases, Computer programs, Vapor phases, Liquids.
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