Análise termofluidodinâmica de escoamento água-óleo em conexões na presença de vazamento: modelagem e simulação.

Abstract

The transport of oil and its derivatives have been made in the vast majority through networks of pipelines linking the oil fields, refineries and distribution networks to consumption centers. And this has been the best way to transport oil, especially in areas of difficult access, ensuring efficiency, lowest cost and safety. In the chemical and petroleum industry, the concept of failure should be observed comprehensively and can mean a serious event, which requires the production to a halt due to the imminent risk of accidents with catastrophic consequences for humans and / or the environment. What stimulates the development of reliable techniques for the rapid and accurate detection of leaks along the pipe in order to eliminate or minimize the loss and environmental damage. Understanding the flow behavior in the presence of leakage enables indication of leakage detection techniques that generate false alarms. This study evaluated the effect of the numerical presence of leakage of two-phase flow (oil-water) pipe connections using the commercial software ANSYS CFX. With the field profiles of volume fraction, temperature and velocity and pressure, it was possible to evaluate the influence of the leakage flux and the evolution of pressure and pressure drop with time. The results of the numerical simulations have demonstrated a role in the choice of boundary conditions the pouring hole.