Numerical Simulation of Particle Mixing Feature for a Gas-Liquid-Solid Three Phase Flow in an Impeller-Driven Stirred Vessel

2011 ◽  
Vol 130-134 ◽  
pp. 869-872
Author(s):  
Ru Quan Liang ◽  
Fu Sheng Yan ◽  
Jun Hong Ji ◽  
Ji Cheng He
Keyword(s):  
Particle Distribution ◽  
Fluid Model ◽  
Phase Flow ◽  
Particle Volume ◽  
Stirred Vessel ◽  
Particle Mixing ◽  
Three Phase ◽  
Three Phase Flow ◽  
Side Walls ◽  
Vessel Bottom

In this work, numerical simulations have been conducted to investigate the particle mixing feature in a stirred vessel driven by an impeller. The Eulerian multi-fluid model has been employed along with the standard k–ε turbulence model to simulate the gas-liquid-solid three-phase flow in the stirred vessel. The effects of impeller speed and immersion depth of impeller on the particle distribution are discussed. The results show that the particle volume fractions nearby the vessel bottom are large on the vicinity of the side walls of the vessel and small in the vessel middle region at different impeller speeds and immersion depths.

Hydrodynamic Modeling of Three-Phase Flow in Production and Gathering Pipelines

2007 ◽  
Author(s):  
Jose Zaghloul ◽  
Michael Adewumi ◽  
M. Thaddeus Ityokumbul
Keyword(s):  
Water Flow ◽  
Fluid Model ◽  
Hydrate Formation ◽  
Phase Flow ◽  
Gas Oil ◽  
Two Phase ◽  
Flow Reduction ◽  
Three Phase ◽  
Three Phase Flow ◽  
Oil Water

The transport of unprocessed gas streams in production and gathering pipelines is becoming more attractive for new developments, particularly those is less friendly enviroments such as deep offshore locations. Transporting gas, oil, and water together from wells in satellite fields to existing processing facilities reduces the investments required for expanding production. However, engineers often face several problems when designing these systems. These problems include reduced flow capacity, corrosion, emulsion, asphaltene or wax deposition, and hydrate formation. Engineers need a tool to understand how the fluids travel together, quantify the flow reduction in the pipe, and determine where, how much, and the type of liquid that would from in a pipe. The present work provides a fundamental understanding of the thermodynamics and hydrodynamic mechanisms of this type of flow. We present a model that couples complex hydrodynamic and thermodynamic models for describing the behavior of fluids traveling in near-horizontal pipes. The model incorporates: • A hydrodynamic formulation for three-phase flow in pipes. • A thermodynamic model capable of performing two-phase and three-phase flow calculations in an accurate, fast and reliable manner. • A new theoretical approach for determining flow pattern transitions in three-phase (gas-oil-water) flow, and closure models that effectively handle different three-phase flow patterns and their transitions. The unified two-fluid model developed herein is demonstrated to be capable of handling systems exhibiting two-phase (gas-water and gas-oil) and three-phase (gas-oil-water) flow. Model predictions were compared against field and experimental data with excellent matches. The hydrodynamic model allows: 1) the determination of flow reduction due to the condensation of liquid(s) in the pipe, 2) assessment of the potential for forming substances that might affect the integrity of the pipe, and 3) evaluation of the possible measures for improving the deliverability of the pipeline.

Development of Transient Mechanistic Three-Phase Flow Model for Wellbores

SPE Journal ◽  
2016 ◽  
Vol 22 (01) ◽  
pp. 374-388 ◽  
Author(s):  
Mahdy Shirdel ◽  
Kamy Sepehrnoori
Keyword(s):  
Multiphase Flow ◽  
Flow Model ◽  
Fluid Model ◽  
Phase Flow ◽  
Complex Flow ◽  
Flow Models ◽  
Drift Flux Model ◽  
Three Phase ◽  
Three Phase Flow ◽  
Two Fluid

Summary Multiphase flow models have been widely used for downhole-gauging and production logging analysis in the wellbores. Coexistence of hydrocarbon fluids with water in production wells yields a complex flow system that requires a three-phase flow model for better characterizing the flow and analyzing measured downhole data. In the past few decades, many researchers and commercial developers in the petroleum industry have aggressively expanded development of robust multiphase flow models for the wellbore. However, many of the developed models apply homogeneous-flow models with limited assumptions for slippage between gas and liquid bulks or use purely two-fluid models. In this paper, we propose a new three-phase flow model that consists of a two-fluid model between liquid and gas and a drift-flux model between water and oil in the liquid phase. With our new method, we improve the simplifying assumptions for modeling oil, water, and gas multiphase flow in wells, which can be advantageous for better downhole flow characterization and phase separations in gravity-dominated systems. Furthermore, we developed semi-implicit and nearly implicit numerical algorithms to solve the system of equations. We discuss the stepwise-development procedures for these methods along with the assumptions in our flow model. We verify our model results against analytical solutions for the water faucet problem and phase redistribution, field data, and a commercial simulator. Our model results show very good agreement with benchmarks in the data.

scholarly journals Study of Gas-solid-solid Three-phase Flow in Non-Powered Separator

2021 ◽  
pp. 98-105
Author(s):  
Weiyi Huang ◽  
Jinfa Shi ◽  
Jie Yang ◽  
Junxu Ma
Keyword(s):  
Fluid Model ◽  
Control Valve ◽  
Volume Control ◽  
Phase Flow ◽  
Sand Production ◽  
Blade Angle ◽  
Three Phase ◽  
Three Phase Flow ◽  
Fluent Software ◽  
Phase Fluid

The non-powered separator is one of the key equipment in the dry sand production line, which is responsible for the separation of coarse and fine materials. In this paper, based on the turbulence Standard  Model, the air sand powder three-phase fluid model is simplified to gas-solid-solid three-phase flow, and the 3D model of the non-powered separator was built. The process of sand powder separation was simulated by using Fluent software. It is found that the larger the air volume control valve blade angle is, the more sand is removed, and the blade angle can be adjusted in the range of 15° to 60° according to the actual needs in industrial production.

Simulation of Intermittent Gas-Bubbly Oil Three Phase Flow in Upward Vertical Pipe Using the Two-Fluid Model

2012 ◽  
Author(s):  
Octavio Cazarez-candia ◽  
Daniel de Jesus Montoya-Hernandez ◽  
Antonio C. Bannwart
Keyword(s):  
Fluid Model ◽  
Phase Flow ◽  
Vertical Pipe ◽  
Three Phase ◽  
Three Phase Flow ◽  
Two Fluid Model ◽  
Two Fluid

Hydrodynamic Modeling of Three-Phase Flow in Production and Gathering Pipelines

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Jose Zaghloul ◽  
Michael Adewumi ◽  
M. Thaddeus Ityokumbul
Keyword(s):  
Fluid Model ◽  
Hydrate Formation ◽  
Phase Flow ◽  
Gas Oil ◽  
Wax Deposition ◽  
Liquid Loading ◽  
Two Phase ◽  
Flow Reduction ◽  
Three Phase ◽  
Three Phase Flow

The transport of unprocessed gas streams in production and gathering pipelines is becoming more attractive for new developments, particularly those in less friendly environments such as deep offshore locations. Transporting gas, oil, and water together from wells in satellite fields to existing processing facilities reduces the investments required for expanding production. However, engineers often face several problems when designing these systems. These problems include reduced flow capacity, corrosion, emulsion, asphaltene or wax deposition, and hydrate formation. Engineers need a tool to understand how the fluids travel together, to quantify the flow reduction in the pipe, and to determine where, how much, and what type of liquid that would form in a pipe. The present work provides a fundamental understanding of the thermodynamics and hydrodynamic mechanisms of this type of flow. We present a model that couples complex hydrodynamic and thermodynamic models for describing the behavior of fluids traveling in near-horizontal pipes. The model presented herein focuses on gas transmission exhibiting low-liquid loading conditions. The model incorporates a hydrodynamic formulation for three-phase flow in pipes, a thermodynamic model capable of performing two-phase and three-phase flash calculations in an accurate, fast, and reliable manner, and a theoretical approach for determining flow pattern transitions in three-phase (gas-oil-water) flow and closure models that effectively handle different three-phase flow patterns and their transitions. The unified two-fluid model developed herein is demonstrated to be capable of handling three-phase systems exhibiting low-liquid loading. Model predictions were compared against field data with good agreement. The hydrodynamic model allows (1) the determination of flow reduction due to the condensation of liquid(s) in the pipe, (2) the assessment of the potential for forming substances that might affect the integrity of the pipe, and (3) the evaluation of the possible measures for improving the deliverability of the pipeline.

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