Liquid droplet entrainment in two-phase oil-gas low-liquid-loading flow in horizontal pipes at high pressure

2018 ◽  
Vol 99 ◽  
pp. 383-396 ◽  
Author(s):  
Duc Huu Vuong ◽  
Cem Sarica ◽  
Eduardo Pereyra ◽  
Abdelsalam Al-Sarkhi
Keyword(s):  
High Pressure ◽  
Liquid Droplet ◽  
Liquid Loading ◽  
Two Phase ◽  
Horizontal Pipes ◽  
Droplet Entrainment ◽  
Oil Gas

scholarly journals A Pressure-Drop Model for Oil-Gas Two-Phase Flow in Horizontal Pipes

2021 ◽  
Vol 17 (2) ◽  
pp. 371-383
Author(s):  
Xinke Yang ◽  
Shanzhi Shi ◽  
Hui Zhang ◽  
Yuzhe Yang ◽  
Zilong Liu ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipes ◽  
Oil Gas

scholarly journals Droplet entrainment correlation for high pressure annular two-phase flow

1996 ◽  
Author(s):  
M.A. Lopez de Betodano ◽  
Cheng-Shiun Jan ◽  
S.G. Beus
Keyword(s):  
High Pressure ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Droplet Entrainment

Modeling of Falling Film in Vertical Downward Two-Phase Pipe Flow

2012 ◽  
Author(s):  
Jose M. Lopez ◽  
Ram Mohan ◽  
Ovadia Shoham ◽  
Luis Gomez ◽  
Gene Kouba
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Liquid Droplet ◽  
Mechanistic Model ◽  
Mineral Oil ◽  
Liquid Film Thickness ◽  
Falling Film ◽  
Two Phase ◽  
Droplet Entrainment ◽  
Falling Liquid Film

Falling liquid films in vertical pipes are found in a variety of different industrial applications and industrial equipment, such as downcomers, caisson separators and reactors. The hydrodynamics of the falling film in vertical two-phase pipe flow can affect droplet entrainment, gas entrainment, and pressure drop. Therefore, a mechanistic model for prediction of falling liquid film thickness, falling liquid film velocity and a correlation for liquid droplet entrainment fraction in vertical downward liquid-gas systems has been proposed. The falling film model developed is based on applying momentum balance on the liquid film. The liquid film is assumed to be in steady-state, incompressible and free of entrained gas. The mechanistic model includes both the developing and the developed regions. The shear effect between the gas core and the falling liquid film is considered. The liquid droplet entrainment fraction traveling in the gas core is considered and a new correlation for its prediction is proposed. Detailed uncertainty analysis is performed for liquid film thickness and liquid film velocity model predictions, including Monte Carlo simulation. Predicted liquid film thickness, liquid film velocity and liquid droplet entrainment fraction are validated against experimental data for different liquid fluid properties, such as water, Conosol mineral oil (light oil) and Drake mineral oil (heavy oil).

Experimental Study of Low Liquid Loading Gas-Liquid Flow in Near-Horizontal Pipes

2001 ◽  
Author(s):  
Nicolas R. Olive ◽  
Hong-Quan Zhang ◽  
Clifford L. Redus ◽  
James P. Brill
Keyword(s):  
Flow Rate ◽  
Annular Flow ◽  
Film Flow ◽  
Phase Flow ◽  
Flow Loop ◽  
Liquid Holdup ◽  
Liquid Loading ◽  
Two Phase ◽  
Horizontal Pipes ◽  
Liquid Film Flow

Abstract Gas-liquid two-phase flow exists extensively in the transportation of hydrocarbon fluids. A more precise prediction of liquid holdup in near-horizontal, wet-gas pipelines is needed in order to better predict pressure drop and size downstream processing facilities. The most important parameters are pipe geometry (pipe diameter and orientation), physical properties of the gas and liquid (density, viscosity and surface tension) and flow conditions (velocity, temperature and pressure). Stratified flow and annular flow are the two flow patterns observed most often in near-horizontal pipelines under low liquid loading conditions. Low liquid loading is commonly referred to as cases in which liquid loading is less than 1,100 m3/MMm3 (200 bbl/MMscf). A previous study by Meng [1] was carried out on a new low liquid loading flow loop. A transparent test section (50.8-mm inner diameter and 19-m long) could be inclined within ± 2° from the horizontal. Mineral oil was used as the liquid and air was used as the gas phase. A surprising phenomenon was observed with air-oil flow; at high gas velocities (annular flow), liquid film flow rate, liquid holdup and pressure gradient decreased as liquid velocity increased. Low liquid loading gas-liquid two-phase flow in near-horizontal pipes was studied for air-water flow in the present study, in order to investigate the effects of the liquid properties on flow characteristics. This study was carried out on the same 2-in. ID flow loop used by Meng. The measured parameters included gas flow rate, liquid flow rate, pressure, differential pressure, temperature, liquid holdup, pipe wetted perimeter, liquid film flow rate, droplet entrainment fraction and droplet deposition rate. A new phenomenon was observed with air-water flow at low superficial velocities and with a liquid loading larger than 600 m3/MMm3. The liquid holdup increased as gas superficial velocity increased.

A Physical Model for Predicting Annular Film Flow Droplet Entrainment in Heat Transfer Systems

2002 ◽  
Author(s):  
M. J. Holowach ◽  
L. E. Hochreiter ◽  
F. B. Cheung
Keyword(s):  
Heat Transfer ◽  
Film Flow ◽  
Liquid Droplet ◽  
Flow Analysis ◽  
Interfacial Instability ◽  
Force Balance ◽  
Interfacial Instabilities ◽  
Two Phase ◽  
Droplet Entrainment ◽  
Annular Film

The ability to accurately predict droplet entrainment in annular two-phase flow is required to effectively calculate the interfacial mass, momentum, and energy transfer, which characterizes nuclear reactor safety, system design, analysis, and performance. Most annular flow entrainment models in the open literature are formulated in terms of dimensionless groups, which do not directly account for interfacial instabilities. However, many researchers agree that there is a clear presence of interfacial instability phenomena having a direct impact on droplet entrainment. The present study proposes a model for droplet entrainment, based on the underlying physics of droplet entrainment from co-current upward annular film flow that is characteristic to Light Water Reactor (LWR) safety analysis. The model is developed based on force balance and a stability analysis that can be implemented into a transient three-field (continuous liquid, droplet, and vapor) two-phase heat transfer and fluid flow analysis computer code.

Experimental Study of Low Liquid Loading Gas-Liquid Flow in Near-Horizontal Pipes

2003 ◽  
Vol 125 (4) ◽  
pp. 294-298 ◽  
Author(s):  
Nicolas R. Olive ◽  
Hong-Quan Zhang ◽  
Qian Wang ◽  
Clifford L. Redus ◽  
James P. Brill
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Liquid Flow ◽  
Two Phase Flow ◽  
Liquid Density ◽  
Phase Flow ◽  
Liquid Holdup ◽  
Liquid Loading ◽  
Two Phase ◽  
Horizontal Pipes

Gas-liquid two-phase flow exists extensively in the transportation of hydrocarbon fluids. A more precise prediction of liquid holdup in near-horizontal, wet-gas pipelines is needed in order to better predict pressure drop and size downstream processing facilities. The most important parameters are pipe geometry (pipe diameter and orientation), physical properties of the gas and liquid (density, viscosity and surface tension) and flow conditions (velocity, temperature and pressure). Stratified flow and annular flow are the two flow patterns observed most often in near-horizontal pipelines under low liquid loading conditions. Low liquid loading is commonly referred to as cases in which liquid loading is less than 1,100m3/MMm3 (200 bbl/MMscf). Low liquid loading gas-liquid two-phase flow at −1° downward pipe was studied for air-water flow in the present study. The measured parameters included gas flow rate, liquid flow rate, pressure, differential pressure, temperature, liquid holdup, pipe wetted perimeter, liquid film flow rate, droplet entrainment fraction and droplet deposition rate. A new phenomenon was observed with air-water flow at low superficial velocities and with a liquid loading larger than 600m3/MMm3. The liquid holdup increased as gas superficial velocity increased. In order to investigate the effects of the liquid properties on flow characteristics, the experimental results for air-water flow are compared with the results for air-oil flow provided by Meng. (1999, “Low Liquid Loading Gas-Liquid Two-Phase Flow In Near-Horizontal Pipes,” Ph.D. Dissertation, U. of Tulsa.)

Sign in / Sign up

Export Citation Format

Share Document