Journal ArticleDOI
A rigorous method for predicting the critical properties of multicomponent systems from an equation of state
Ding-Yu Peng,Donald B. Robinson +1 more
TLDR
In this paper, the rigorous critical state criterion enunciated by Willard Gibbs can be used with a recently formulated two-parameter equation of state to obtain an analytical solution to the problem of predicting the critical properties of defined multicomponent mixtures.Abstract:
This paper shows how the rigorous critical state criterion enunciated by Willard Gibbs can be used with a recently formulated two-parameter equation of state to obtain an analytical solution to the problem of predicting the critical properties of defined multicomponent mixtures. Comparisons are made between predicted and experimental values for several systems containing paraffin hydrocarbons and related materials.read more
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Journal ArticleDOI
The isothermal flash problem. Part II. Phase-split calculation
TL;DR: In this paper, an algorithm for calculation of multiphase equilibrium at given temperature and pressure using a single Equation of State as the thermodynamic model is described, and the use of stability analysis to generate initial estimates and of second order convergence methods lead to rapid solution even in the immediate vicinity of critical points.
Journal ArticleDOI
Supercritical (and subcritical) fluid behavior and modeling: drops, streams, shear and mixing layers, jets and sprays
TL;DR: A critical review of recent investigations in the realm of supercritical (and subcritical) fluid behavior is presented with the goal of obtaining a perspective on the peculiarities of high pressure observations as discussed by the authors.
Journal ArticleDOI
Calculation of phase envelopes and critical points for multicomponent mixtures
TL;DR: In this article, an algorithm for the construction of complete vapour envelopes, capable of accurately determining the critical points and maxima in temperature and pressure is described, and a computationally more convenient formulation is suggested.
Journal ArticleDOI
Predicting the Phase Equilibria of Synthetic Petroleum Fluids with the PPR78 Approach
TL;DR: The PPR78 approach as mentioned in this paper is a group contribution-based thermodynamic model which combines at constant packing fraction the Peng-Robinson equation of state and a Van Laar-type gE model.
Journal ArticleDOI
Direct numerical simulation of a transitional supercritical binary mixing layer: heptane and nitrogen
Nora Okong'o,Josette Bellan +1 more
TL;DR: In this paper, direct numerical simulations of a supercritical temporal mixing layer are conducted for the purpose of exploring the characteristics of high-pressure transitional mixing behavior. But the results suggest that classic PDFs used in atmospheric pressure flows would not capture the physics of this supercritical mixing layer, either in an assumed PDF model at the larger scale, or at the subgrid scale.