Transporte multifásico não isotérmico de óleo pesado, água e ar em tubo horizontal via core-flow: modelagem e simulação.

Abstract

Ultra viscous heavy oil transport by using the core-annular flow technique has been used in present day, providing a large reduction of pressure drop during flow. In this sense, the purpose of this work is to study numerically the non-isothermal, three phase flow (heavy oil-water-gas), in horizontal pipe, taking into account the effects of gravity and drag, by using the core-flow technique and the commercial package ANSYS® CFX. It was adopted the standard K -S turbulence model, mixture model for the water-oil interactions and particle model for gas-oil and water-gas interactions. Results of the pressure, velocity, temperature and volume fraction distribution of the phases and the pressure drop along the pipe are presented and discussed. It was observed that the presence of gas phase and temperature variation affect the behavior of the annular flow and pressure drop. The numerical results of pressure drop along the pipe are compared with the data available in the literature and good concordance was verified.