Experimental Study of (Water–Oil) Flow Patterns and Pressure Drop in Vertical and Horizontal Pipes

2018 ◽  
Vol 26 (04) ◽  
pp. 1850034 ◽  
Author(s):  
Sabreen A. Abood ◽  
Mohammed A. Abdulwahid ◽  
Mujtaba A. Al-Mudhafar
Keyword(s):  
Digital Camera ◽  
Water Layer ◽  
Flow Patterns ◽  
Vertical Pipe ◽  
Horizontal Pipe ◽  
Horizontal Pipes ◽  
Interface Scattering ◽  
Oil In Water ◽  
Oil Flow ◽  
Inner Diameter

This paper provides the results of experimental stream flow patterns (water–oil) investigated in vertical and horizontal pipes with an elbow. The pipes are made from Perspex; the inner diameter is 0.024[Formula: see text]m, and the lengths of the vertical and horizontal pipes are 6 and 3[Formula: see text]m, respectively. The values of pressure at the four locations where [Formula: see text], 138, 248, and 304 are measured in various cases. The superficial velocities of the water range from 0.1 to 0.4[Formula: see text]m/s and of the oil from 0.1 to 0.9[Formula: see text]m/s. The pressure decreases with an increase in the height and the speed. Droplet/elongated/churn and annular streams are observed in a vertical pipe. The flow patterns are the stratified wavy stream with droplets at the interface, scattering (dispersion) of oil in water with a water layer, and annular flow in the horizontal pipe. These results of flow patterns are determined by a digital camera.

Oil-Water Separation in a Novel Liquid-Liquid Cylindrical Cyclone (LLCC) Compact Separator: Experiments and Modeling

2003 ◽  
Author(s):  
C. Oropeza-Vazquez ◽  
E. Afanador ◽  
L. Gomez ◽  
S. Wang ◽  
R. Mohan ◽  
...  
Keyword(s):  
Free Water ◽  
Water Layer ◽  
Flow Patterns ◽  
Water Stream ◽  
Water Separation ◽  
Inlet Flow ◽  
Water Dispersion ◽  
Split Ratio ◽  
Oil In Water ◽  
Layer Flow

The hydrodynamics of multiphase flow in a Liquid-Liquid Cylindrical Cyclone (LLCC) compact separator have been studied experimentally and theoretically for evaluation of its performance as a free water knockout device. In the LLCC, no complete oil-water separation occurs. Rather, it performs as a free water knockout, delivering a clean water stream in the underflow and an oil rich stream in the overflow. A total of 260 runs have been conducted for the LLCC for water-dominated flow conditions. Four different flow patterns in the inlet have been identified, namely, Stratified flow, Oil-in-Water Dispersion and Water Layer flow, Double Oil-in-Water Dispersion flow, and Oil-in-Water Dispersion flow. For all runs, an optimal split ratio (underflow to inlet flow rate ratio) exists, where the flow rate in the water stream is maximum with 100% water cut. The value of the optimal split ratio depends upon the existing inlet flow pattern, varying between 60% (for Stratified and Oil-in-Water Dispersion and Water Layer flow patterns) to 20% for the other inlet flow patterns. For split ratios higher than the optimal one, the water cut in the underflow stream decreases as the split ratio increases. A novel mechanistic model has been developed for the prediction of the complex flow behavior and the separation efficiency in the LLCC. The model consists of several sub-models, including inlet analysis, nozzle analysis, droplet size distribution model, and separation model based on droplet trajectories in swirling flow. Comparisons between the experimental data and the LLCC model predictions show excellent agreement. The model is capable of predicting both the trend of the experimental data as well as the absolute measured values. The developed model can be utilized for the design and performance analysis of the LLCC.

scholarly journals Modeling of Sand and Crude Oil Flow in Horizontal Pipes during Crude Oil Transportation

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Samuel Eshorame Sanni ◽  
A. S. Olawale ◽  
S. S. Adefila
Keyword(s):  
Crude Oil ◽  
Mathematical Description ◽  
Oil And Gas ◽  
Solid Phase ◽  
Mass Conservation ◽  
Conservation Equation ◽  
Gas Reservoirs ◽  
Horizontal Pipe ◽  
Horizontal Pipes ◽  
Oil Flow

Some oil and gas reservoirs are often weakly consolidated making them liable to sand intrusion. During upstream petroleum production operations, crude oil and sand eroded from formation zones are often transported as a mixture through horizontal pipes up to the well heads and between well heads and flow stations. The sand transported through the pipes poses serious problems ranging from blockage, corrosion, abrasion, and reduction in pipe efficiency to loss of pipe integrity. A mathematical description of the transport process of crude oil and sand in a horizontal pipe is presented in this paper. The model used to obtain the mathematical description is the modified form of Doan et al. (1996 and 2000) models. Based on the necessity to introduce a sand deposit concentration term in the mass conservation equation, an additional equation for solid phase was derived. Difference formulae were generated having applied Fick’s equation for diffusion to the mass conservation equations since diffusion is one of the transport mechanisms. Mass and volume flow rates of oil were estimated. The new model, when tested with field data, gave 85% accuracy at the pipe inlet and 97% accuracy at the exit of the pipe.

Numerical Study of Heavy Oil Flow on Horizontal Pipe Lubricated by Water

2012 ◽  
pp. 99-118 ◽  
Author(s):  
Tony Herbert Freire de Andrade ◽  
Kelen Cristina Oliveira Crivelaro ◽  
Severino Rodrigues de Farias Neto ◽  
Antonio Gilson Barbosa de Lima
Keyword(s):  
Heavy Oil ◽  
Numerical Study ◽  
Horizontal Pipe ◽  
Oil Flow

Heat Transfer Correlations for Air-Water Two-Phase Flow of Different Flow Patterns in a Horizontal Pipe

2000 ◽  
Author(s):  
Dongwoo Kim ◽  
Jae-yong Kim ◽  
Afshin J. Ghajar ◽  
Ronald L. Dougherty
Keyword(s):  
Heat Transfer ◽  
Flow Patterns ◽  
Mean Deviation ◽  
Water Mixture ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flux Boundary Condition ◽  
Uniform Wall ◽  
Heat Transfer Correlations ◽  
Two Phase Heat Transfer

Abstract New heat transfer correlations were developed for two-phase heat transfer in a horizontal pipe for different flow patterns. Flow patterns were observed in a transparent circular pipe (2.54 cm I.D. and L/D = 96) using an air/water mixture. Visual identification of the flow patterns was supplemented with photographic data, and the results were plotted on the flow regime map proposed by Taitel and Dukler and agreed quite well with each other. A two-phase heat transfer experimental setup was built for this study and a total of 150 two-phase heat transfer data with different flow patterns were obtained under a uniform wall heat flux boundary condition. For these data, the superficial Reynolds number ranged from 640 to 35,500 for the liquid and from 540 to 21,200 for the gas. Our previously developed robust two-phase heat transfer correlation for a vertical with modified constants predicted the horizontal pipe air-water heat transfer experimental data with good accuracy. Overall the proposed correlations predicted the data with a mean deviation of 1.0% and an rms deviation of 12%.

Simulation of Intermittent Flow Development in a Horizontal Pipe

2019 ◽  
Vol 141 (12) ◽  
Author(s):  
Hamed Nasrfard ◽  
Hassan Rahimzadeh ◽  
Ali Ahmadpour ◽  
Ehsan Amani
Keyword(s):  
Three Dimensional ◽  
Intermittent Flow ◽  
Horizontal Pipe ◽  
Vof Model ◽  
New Findings ◽  
Air Water Interface ◽  
Elongated Bubble ◽  
Bubble Length ◽  
Computational Fluid Dynamics Cfd ◽  
Inner Diameter

In this study, detailed three-dimensional (3D) numerical simulations of intermittent multiphase flows were carried out to investigate the slug initiation process and various features of intermittent flows inside a horizontal pipe. Air and water are used as working fluids. The domain used for simulations is a 14.4 m long pipe with 54 mm inner diameter. The volume of fluid (VOF) model was used to capture the air/water interface and its temporal evolution. Using the developed computational fluid dynamics (CFD) model, the slug formation and propagation along horizontal circular pipe were successfully predicted and studied comprehensively. Slug length and the frequency of slug formation, as two main features of intermittent flow, were used to validate the model against experimental results and available correlations in the literature. Three-dimensional numerical simulation of intermittent flow proved to be a powerful tool in tackling limitations of experiments and providing detailed data about various features of the intermittent flow. The effect of gas and liquid superficial velocities on the liquid slug and elongated bubble length was explored. Moreover, the study revealed new findings related to the elongated bubble shape and velocity field in the slug unit.

Field synergy analysis of different flow patterns in falling-film dehumidification system with horizontal pipes

2020 ◽  
Vol 27 (8) ◽  
pp. 2353-2366
Author(s):  
Run-ping Niu ◽  
Da-qing Kuang ◽  
Shi-zheng Wang ◽  
Xiao-yi Chen
Keyword(s):  
Flow Patterns ◽  
Falling Film ◽  
Field Synergy ◽  
Horizontal Pipes
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