The author’s new class of linear chain clusters is described in this chapter, as well as the methods for evaluating their properties. There are two types of clusters in real gases: linear clusters with a small number of bonds between particles and closely bound two and three dimensional clusters. For several pure gases, the experimental data analysis reveals large temperature and density zones dominated by linear chain clusters. At moderate densities of real gases, expanding the possible energy density sequence by the monomer fraction density yields cluster bond parameters and their equilibrium constants, which can be attributed to this new class of clusters. The computer-aided study of precise thermophysical data for pure fluids using monomer fraction density reveals wonderful properties of these unknown cluster structures in real gases. Extrapolating the properties of these loosely bound clusters to higher densities yields a variety of tightly bound three-dimensional clusters in sub- and supercritical fluids in general, and particularly in CO2. It’s crucial to understand the structure and parameters of the clusters in this gas, which is commonly used in supercritical fluid technologies. The properties of massive three-dimensional clusters of numbers n of particles up to the level of one thousand are discovered by moving from diluted to dense gases step by step. The soft structural transition between dominating cluster fractions with neighbour numbers n and between gas-like and liquid-like supercritical fluids is studied using a logarithmic method to estimate the averaged numbers n of particles in three-dimensional clusters.

Author (s) Details

Boris Sedunov
Computer and Information Systems Department, Russian New University, Moscow, Russia.

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