Part 2. Special Issues in Intellectual Systems Theory

Functions for approximating gas and oil volumes in phase transition region

E. V. Koldoba

Lomonosov Moscow State University, Faculty of Mechanics and Mathematics

Abstract: Phase transitions in multicomponent oil solutions are considered. Dependencies for the molar volumes of the gas and liquid phases are proposed. The formulas take into account the behavioral characteristics of solutions, nnamely, changes in concentration during phase transitions. They enable highly accurate approximation of real dependencies and the construction of analytical models with phase transitions over wide ranges of pressures and temperatures.

Keywords: hydrocarbon solutions, phase equilibrium, mathematical modeling, thermodynamics.