Análise de padrões de escoamento multifásico por meio do modelo mecanicista de Hasan-Kabir

Abstract

Multiphase flow can be defined as one in which at least two immiscible fluids flow together in a certain direction. This type of outflow is mainly present in the activities of the oil and petrochemical industry. Flow patterns are identified in the multiphase flow according to the geometry distributions of the phases in the mixture. Non-homogeneous empirical correlation models and mechanistic models are the most used to make the analytical description of multiphase flow. This work aimed to carry out a study of mechanistic vertical multiphase flow, in which the concepts of flow patterns, superficial velocities, liquid phase volumetric fractions (holdup) and phase transition conditions were highlighted. These concepts were applied in the classic Hasan-Kabir model, chosen for the analysis of the flow by considering the slip between phases and the identification of patterns based on phase transition parameters with greater rigor in fluid mechanics. To predict the multiphase flow behavior using the Hasan-Kabir model, a computational algorithm was developed for simulations with phases in a mixture of gas, water and oil flowing vertically under different conditions of pressure and temperature. Superficial velocities, specific masses, friction factor and flow pressure gradients were obtained. A two-phase water and gas experiment was carried out for the visual purpose of identifying the main patterns of vertical flow. All simulations performed showed satisfactory results compared to the application of examples from literature.