scholarly journals Drift‐flux model for gas–liquid flow subjected to centrifugal fields

AIChE Journal ◽  
2021 ◽  
Author(s):  
Marcos R. M. Penteado ◽  
Saon C. Vieira ◽  
Marcelo S. Castro ◽  
Antonio C. Bannwart
Keyword(s):  
Liquid Flow ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model ◽  
Gas Liquid Flow

The Drift Flux Model After Fifty Years: A Personal, Problem Solving Survey

2013 ◽  
Author(s):  
Peter Toma
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Operating Conditions ◽  
Gas Oil ◽  
Local Flow ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Discrete Phase ◽  
Flux Model ◽  
Gas Liquid Flow

Offspring of the nuclear reactor industry and gas-oil production, multiphase fluids handling technology appears to have matured into an entirely new field of inquiry, most notably following broad acceptance of the drift flux and flow pattern concepts and their widespread integration into engineering calculations. The drift flux model (DFM), first suggested by Nicklin in 1962 and, soon after, adapted and developed by Professor Zuber’s research group at General Electric, enables calculation of “locally averaged” phase velocity. Further progress made in selection of the flow patterns, calculated for each section of the pipe, provided the key to properly assessing the terminal velocity of the discrete phase and the local phase distributions. The flow pattern concept was first introduced by Canadian Charles Govier to describe oil-water laboratory experiments, then by Hewitt-Roberts and Baker in 1954. A decade later, the team of Dukler-Taitel-Barnea developed the qualitative flow pattern concept into a quantitative roadmap procedure leading to rational calculations of the local (cross-section averaged) gas-liquid flow geometry, or flow pattern. The homogeneous gas-liquid flow, presuming the equality of gas and liquid velocities, a simplification broadly accepted during the early days of two-phase flow engineering, came to be regarded, due to Hinze’s work (Shell, 1955), as an identifiable region in the local flow map, reflecting turbulent and high-shear breakup of the discrete phase. To illustrate the usefulness, validity, and importance of the DFM, and mechanistic modeling using the DFM, as well as the salient work of Prof. Zuber on boiling instability this paper discuses reduction of potential explosive droplet boiling risk during multiphase pumping of high–gas-oil ratio mixtures. To assess critical operating conditions of the multiphase pumps, the Ishi-Zuber criteria developed during 1970 for assessing potential boiling instabilities were adapted to multiphase pumping/compression equipment and the results compared to field instability data. The elucidation of this problem relies heavily on the DFM and on salient research performed during 70s by Prof. Zuber’s team.

Gas-liquid flow of sub-millimeter bubbles at low void fractions: Void fraction prediction using drift-flux model

2018 ◽  
Vol 98 ◽  
pp. 195-205 ◽  
Author(s):  
Sotiris P. Evgenidis ◽  
Thodoris D. Karapantsios
Keyword(s):  
Void Fraction ◽  
Liquid Flow ◽  
Drift Flux Model ◽  
Void Fractions ◽  
Drift Flux ◽  
Flux Model ◽  
Gas Liquid Flow

scholarly journals Drift-flux model for gas-liquid flow subjected to centrifugal fields

2021 ◽  
Author(s):  
Marcos Penteado ◽  
Saon Vieira ◽  
Marcelo Castro ◽  
Antonio Bannwart
Keyword(s):  
Liquid Flow ◽  
High Speed ◽  
Bubble Diameter ◽  
Liquid Mixtures ◽  
Centrifugal Pumps ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Artificial Lift ◽  
Flux Model ◽  
Gas Liquid Flow

Centrifugal pumps are used in several industrial processes. It is common the operation of this equipment with gas-liquid mixtures, which is the case of the electrical submersible pumping artificial lift method used in the oil industry. The increase of free gas fraction inside the pump may lead to unstable operation and problems such as surging and gas locking phenomena to occur. In this study a drift-flux model is proposed for the gas-liquid flow subjected to centrifugal fields using the impeller as an example. The model is closed with experimental data of bubble diameter, displacements and velocities acquired via high-speed camera at several different rotational speeds and gas mass flow rates using water as the continuous medium. From the modeling and the forces balance in the bubbles, a quantitative criterion for the start point of surging and gas locking conditions was proposed.

Control-Oriented Drift-Flux Modeling of Single and Two-Phase Flow for Drilling

2014 ◽  
Author(s):  
Ulf Jakob F. Aarsnes ◽  
Florent Di Meglio ◽  
Steinar Evje ◽  
Ole Morten Aamo
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Underbalanced Drilling ◽  
Flux Model ◽  
Gas Liquid Flow ◽  
And Control ◽  
Operating Regimes

We present a simplified drift-flux model for gas-liquid flow in pipes. The model is able to handle single and two-phase flow thanks to a particular choice of empirical slip law. A presented implicit numerical scheme can be used to rapidly solve the equations with good accuracy. Besides, it remains simple enough to be amenable to mathematical and control-oriented analysis. In particular, we present an analysis of the steady-states of the model that yields important considerations for drilling practitioners. This includes the identification of 4 distinct operating regimes of the system, and a discussion on the occurrence of slugging in underbalanced drilling.

Local Liquid Velocity in Vertical Air-Water Downward Flow

2004 ◽  
Vol 126 (4) ◽  
pp. 539-545 ◽  
Author(s):  
Xiaodong Sun ◽  
Sidharth Paranjape ◽  
Seungjin Kim ◽  
Hiroshi Goda ◽  
Mamoru Ishii ◽  
...  
Keyword(s):  
Liquid Flow ◽  
Liquid Velocity ◽  
Laser Doppler Anemometry ◽  
Two Phase ◽  
Downward Flow ◽  
Flow Rates ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Local Measurements ◽  
Flux Model

This paper presents an experimental study of local liquid velocity measurement in downward air-water bubbly and slug flows in a 50.8 mm inner-diameter round pipe. The axial liquid velocity and its fluctuations were measured by a laser Doppler anemometry (LDA) system. It was found that the maximum liquid velocity in a downward two-phase flow could occur off the pipe centerline at relatively low liquid flow rates and this observation is consistent with other researchers’ results. The comparisons between the liquid flow rates measured by a magnetic flow meter and those obtained from the local LDA and multi-sensor conductivity probe measurements showed good agreement. In addition, based on the local measurements the distribution parameter and the drift velocity in the drift-flux model were obtained for the current downward flow tests.

APPLICATION OF THE DRIFT FLUX MODEL IN A TWO-PHASE REFRIGERANT FLOW THROUGH CAPILLARY TUBE

2016 ◽  
Author(s):  
Mariana Barbosa ◽  
Ricardo Augusto Mazza
Keyword(s):  
Capillary Tube ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model ◽  
Flow Through

Lagrangian coordinates for a drift-flux model of a gas-liquid mixture

1996 ◽  
Vol 22 (3) ◽  
pp. 453-460 ◽  
Author(s):  
S.L. Gavrilyuk ◽  
J. Fabre
Keyword(s):  
Liquid Mixture ◽  
Lagrangian Coordinates ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model

Interfacial Structures and Regime Transition in Co-Current Downward Bubbly Flow

2004 ◽  
Vol 126 (4) ◽  
pp. 528-538 ◽  
Author(s):  
S. Kim ◽  
S. S. Paranjape ◽  
M. Ishii ◽  
J. Kelly
Keyword(s):  
Two Phase Flow ◽  
Bubbly Flow ◽  
Superficial Velocity ◽  
Phase Flow ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flow Parameters ◽  
Interfacial Structures ◽  
Flux Model

The vertical co-current downward air-water two-phase flow was studied under adiabatic condition in round tube test sections of 25.4-mm and 50.8-mm ID. In flow regime identification, a new approach was employed to minimize the subjective judgment. It was found that the flow regimes in the co-current downward flow strongly depend on the channel size. In addition, various local two-phase flow parameters were acquired by the multi-sensor miniaturized conductivity probe in bubbly flow. Furthermore, the area-averaged data acquired by the impedance void meter were analyzed using the drift flux model. Three different distributions parameters were developed for different ranges of non-dimensional superficial velocity, defined by the ration of total superficial velocity to the drift velocity.

Interaction of weak shocks in drift-flux model of compressible two-phase flows

2018 ◽  
Vol 107 ◽  
pp. 222-227 ◽  
Author(s):  
S. Kuila ◽  
T. Raja Sekhar
Keyword(s):  
Two Phase Flows ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model ◽  
Weak Shocks
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