Estudo numérico da lubrificação de risers submersos para o transporte de óleos pesados.

Abstract

The proposes of this work is to study numerically the heavy oil flow in submerged risers, catenary type, using core-flow technique and ANSYS CFX 13®. The transient and nonisothermal mathematical model considers free surface model to describe two-phase flow (water-heavy oil) by considering laminar flow for heavy oil and turbulent flow to water phase (k-s turbulence model). Results of velocity, pressure, temperature and volumetric fraction distribution was presented and analyzed. The pressure drop of 3,34 times more than that obtained in a single phase flow (heavy oil) based on the total pressure. This lower value when compared with the available in the literature, was attributed to the presence of regions of adherence along catenary surface and the high viscosity of the produced water used in the simulation.