Escoamento multifásico em duto vertical com vazamento: avaliação físico/geométrica do duto na hidrodinâmica do escoamento.

Abstract

The multiphase flow occur in the stages of exploration, production, transportation, processing and distribution of fluids, especially in the oil and gas industry. The use of pipelines is the conventional, efficient and economical way to transport oil. Pipelines are subject to damage because of the action of physico-chemical nature agents that can deteriorate the duct, causing corrosion, breakage and disruption of fluid flow. Leakage monitoring systems must be able to detect and locate a leak immediately, reducing the risks of environmental and socio-economic impacts, increasing operational safety. From this theme, this work aims to study theoretically the multiphase (oil, gas and water flow), non-isothermal, transient and three-dimensional in vertical pipes with and without leakage, with emphasis on the influence of roughness of the duct wall, and dimensions of the leakage orifice. Results of velocity, pressure, temperature and volume fraction distributions of the phases present in the flow are presented and analyzed. It was found that both the wall roughness of the duct, phase gas and the inlet temperature of the mixture affect directly on average pressure drop of the flow.