Academic Journals Database
Disseminating quality controlled scientific knowledge

Entropy variation in isothermal fluid flow considering real gas effects

Author(s): Maurício Guimarães da Silva | Paulo Afonso Pinto de Oliveira

Journal: Journal of Aerospace Technology and Management
ISSN 1984-9648

Volume: 3;
Issue: 1;
Start page: 29;
Date: 2011;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: Isothermal flow | Real gas | Entropy | Petroleum engineering

The present paper concerns on the estimative of the pressure loss and entropy variation in an isothermal fluid flow, considering real gas effects. The 1D formulation is based on the isothermal compressibility module and on the thermal expansion coefficient in order to be applicable for both gas and liquid as pure substances. It is emphasized on the simple methodology description, which establishes a relationship between the formulation adopted for ideal gas and another considering real gas effects. A computational procedure has been developed, which can be used to determine the flow properties in duct with a variable area, where real gas behavior is significant. In order to obtain quantitative results, three virial coefficients for Helium equation of state are employed to determine the percentage difference in pressure and entropy obtained from different formulations. Results are presented graphically in the form of real gas correction factors, which can be applied to perfect gas calculations.

Tango Rapperswil
Tango Rapperswil

     Affiliate Program