An Improved Redlich-Kwong Equation of State in the Supercritical Region

1971 ◽  
Vol 10 (1) ◽  
pp. 59-64 ◽  
Author(s):  
David G. Skamenca ◽  
Dimitrios P. Tassios
Keyword(s):  
Equation Of State ◽  
Supercritical Region

Heat Transfer Characteristics of Nitrogen in Supercritical Region Using Redlich-Kwong Equation of State

2019 ◽  
Vol 17 (10) ◽  
Author(s):  
Hussain Basha ◽  
G. Janardhana Reddy ◽  
N. S. Venkata Narayanan
Keyword(s):  
Heat Transfer ◽  
Thermal Expansion ◽  
Equation Of State ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Physical Parameters ◽  
Heat Transfer Characteristics ◽  
Reduced Pressure ◽  
Supercritical Region ◽  
Transfer Characteristics

Abstract The present paper studies through numerical methods, the thermodynamic heat transfer characteristics of free convection flow of supercritical nitrogen over a vertical cylinder. In the present analysis, the values of volumetric thermal expansion coefficient ($\beta$) are evaluated based on Redlich-Kwong equation of state (RK-EOS) and Van der Waals equation of state (VW-EOS). The calculated analytical thermal expansion coefficient values using RK-EOS are very close to NIST data values in comparison with VW-EOS. A set of coupled nonlinear partial differential equations (PDEs) governing the supercritical fluid (SCF) flow are derived, converted into non-dimensional form with the help of suitable dimensionless quantities and solved using Crank-Nicolson implicit finite difference method. The simulations are carried out for nitrogen in the supercritical region. The obtained numerical data is expressed in terms of graphs and tables for various values of physical parameters. The increasing value of reduced temperature decreases the average Nusselt number and skin-friction coefficient, whereas amplifying value of reduced pressure enhance the heat transfer rate and wall shear stress in the SCF region. Present results are compared with the previous results and the two are found to be in good agreement, i. e. the numerically generated results found to be in agreement with existing results.

scholarly journals The equation of state of a cell fluid model in the supercritical region

2018 ◽  
Vol 21 (4) ◽  
pp. 43502 ◽  
Author(s):  
Kozlovskii ◽  
Pylyuk ◽  
Dobush
Keyword(s):  
Equation Of State ◽  
Fluid Model ◽  
Supercritical Region ◽  
A Cell

Transient Natural Convection Heat Transfer to CO2 in the Supercritical Region

2018 ◽  
Vol 140 (9) ◽  
Author(s):  
G. Janardhana Reddy ◽  
Hussain Basha ◽  
N. S. Venkata Narayanan
Keyword(s):  
Carbon Dioxide ◽  
Thermal Expansion ◽  
Equation Of State ◽  
Supercritical Carbon Dioxide ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Physical Parameters ◽  
Reduced Pressure ◽  
Supercritical Region ◽  
Supercritical Carbon

Present research paper investigates the transient laminar free convective supercritical carbon dioxide flow past a semi-infinite vertical cylinder using numerical methods. Two new thermodynamic models for the supercritical fluid (SCF) flow are considered. Based on these models, for supercritical carbon dioxide, two new equations for thermal expansion coefficient are obtained on the basis of Redlich–Kwong equation of state (RK-EOS) and Van der Waals equation of state (VW-EOS). Based on the calculated values of thermal expansion coefficient, it is shown that not only RK-EOS is closer to experimental values but also gives greater accuracy when compared to VW-EOS validating RK-EOS as suitable model for predicting natural convective properties of carbon dioxide under supercritical condition. The governing equations of SCF flow are solved numerically using Crank–Nicolson implicit finite difference scheme. Numerical simulations are performed for carbon dioxide in the region of its critical point. Results in subcritical, supercritical, and near-critical regions are shown graphically and discussed for different physical parameters. From the obtained numerical results, it is clear that the steady-state time increases for the increasing values of reduced temperature and reduced pressure for carbon dioxide in supercritical region.

Equation of state for hard convex body fluid mixtures

1998 ◽  
Vol 94 (5) ◽  
pp. 809-814 ◽  
Author(s):  
C. BARRIO ◽  
J.R. SOLANA
Keyword(s):  
Equation Of State ◽  
Convex Body ◽  
Body Fluid ◽  
Fluid Mixtures

Equation of state of shock compressed liquid deuterium

2000 ◽  
Vol 10 (PR5) ◽  
pp. Pr5-281-Pr5-286
Author(s):  
M. Ross ◽  
L. H. Yang ◽  
G. Galli
Keyword(s):  
Equation Of State ◽  
Compressed Liquid

ON THE EQUATION OF STATE OF THE WIGNER MODEL

1980 ◽  
Vol 41 (C2) ◽  
pp. C2-83-C2-83
Author(s):  
Ph. Choquard
Keyword(s):  
Equation Of State
Sign in / Sign up

Export Citation Format

Share Document