Applying CFD in the Analysis of Heavy-Oil Transportation in Curved Pipes Using Core-Flow Technique

Heavy oils, due to their high viscosity, have greater viscous resistance to flow, requiring high pumping power for transport and increasing operating cost. As an alternative to minimize this problem, the core-flow technique emerged, which consists of injecting water simultaneously with the oil flow, causing the heavy oil to be surrounded by a layer of water and flowing in the center of the duct without touching the pipe wall, consequently reducing the friction pressure gradient. Thus, this work aims to numerically study the core-annular flow of oil, water and gas in a cylindrical duct with an elliptical cross-section, considering a three-dimensional, isothermal and incompressible flow. For the numerical solution of the governing equations, the software Ansys FLUENT 15.0 was used. It was found that the lubrication provided by the water on the duct wall reduced the pressure variation by 7.20 times compared to the heavy oil single-phase flow, proving the good efficiency of the core-flow technique.

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“…Several studies have been reported in the literature related to the use of the core-flow technique [12,13,15,17,23,[27][28][29][30][31].…”

Section: Multiphase Flowmentioning

confidence: 99%

CFD Simulation of the Hydrodynamics of Core-Annular Flow of Oil, Gas and Water in Elliptic-Cylindrical Duct

Oliveira

Magalhães

Gomez

et al. 2022

DFMA

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“…Devido a importância, diversos outros trabalhos relacionados com escoamento de óleos pesados usando a técnica core-flow têm sido reportado na literatura (Trevisan, 2003;Rodriguez & Bannwart, 2006;Ooms et al, 2007, Belém, 2008Pereira Filho, 2010;Andrade et al, 2012;Gadelha et al, 2013;Andrade et al, 2013a;Andrade et al, 2013b;Andrade et al, 2014;Conceição et al, 2017;Silva et al, 2020).…”

Section: Introductionunclassified

Modelagem e simulação de escoamento anular de água, óleo pesado e ar em dutos horizontais

Nunes

Brito

Neto

et al. 2020

RSD

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Este artigo tem como objetivo estudar o escoamento trifásico água – óleo pesado – ar em dutos horizontais, utilizando a técnica “core annular flow”. O modelo matemático utilizado foi o não-homogêneo, numa abordagem Euleriana – Euleriana. Considerou-se o modelo de mistura para tratar os termos de transferência de momento interfacial entre as fases contínuas (água e óleo pesado) e o modelo de partícula para tratar os termos de transferência de momento interfacial entre as fases dispersa e contínua (ar e óleo pesado). Todas as simulações foram realizadas utilizando o Software CFX versão 11. Resultados dos campos de pressão e fração volumétrica das fases e queda de pressão no duto são apresentados e comparados com dados experimentais. Verificou-se que a modelagem matemática utilizada foi adequada, apresentado erro máximo com relação aos dados experimentais de queda de pressão de 7,3%, demonstrando a eficiência da técnica core-flow para o transporte trifásico de água - óleo pesado – ar.

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Isothermal Transport (Core-Flow Type) of Heavy and Ultraviscous Oil in Curved Pipes: A Transient Study by CFD

Silva¹,

Magalhães²,

Gomez³

et al. 2020

OJFD

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Applying CFD in the Analysis of Heavy-Oil Transportation in Curved Pipes Using Core-Flow Technique

Cited by 3 publications

References 14 publications

CFD Simulation of the Hydrodynamics of Core-Annular Flow of Oil, Gas and Water in Elliptic-Cylindrical Duct

CFD Simulation of the Hydrodynamics of Core-Annular Flow of Oil, Gas and Water in Elliptic-Cylindrical Duct

Modelagem e simulação de escoamento anular de água, óleo pesado e ar em dutos horizontais

Isothermal Transport (Core-Flow Type) of Heavy and Ultraviscous Oil in Curved Pipes: A Transient Study by CFD

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