Effects of liquid viscosity on liquid film flow in gas-liquid two-phase annular flow

2009 ◽  
Author(s):  
Koji Mori ◽  
Akio Nakata
Keyword(s):  
Liquid Film ◽  
Annular Flow ◽  
Film Flow ◽  
Liquid Viscosity ◽  
Two Phase ◽  
Liquid Film Flow

scholarly journals Liquid Film Flow Phenomena in Upwards Two-Phase Annular Flow

1973 ◽  
Vol 39 (317) ◽  
pp. 313-323 ◽  
Author(s):  
Kotohiko SEKOGUCHI ◽  
Kaneyasu NISHIKAWA ◽  
Masao NAKASATOMI ◽  
Hidetoshi NISHI ◽  
Akira KANEUZI
Keyword(s):  
Liquid Film ◽  
Annular Flow ◽  
Film Flow ◽  
Two Phase ◽  
Flow Phenomena ◽  
Liquid Film Flow

Electrohydrodynamic Conduction Pumping of Liquid Film in Horizontal Annular Configuration

2006 ◽  
Author(s):  
Miad Yazdani ◽  
Jamal Seyed-Yagoobi
Keyword(s):  
Liquid Film ◽  
Annular Flow ◽  
Body Force ◽  
Film Flow ◽  
Finite Thickness ◽  
Force Distribution ◽  
Two Dimensional ◽  
Axisymmetric Channel ◽  
Liquid Film Flow ◽  
Horizontal Interface

Electrohydrodynamic (EHD) conduction pumping is associated with the heterocharge layers of finite thickness in the vicinity of the electrodes, which are based on the process of dissociation of the neutral electrolytic species and recombination of the generated ions. This work numerically studies the electrically driven liquid film flow in horizontal annular configuration based on electric conduction phenomenon. The numerical domain considered is represented by a two dimensional developing axisymmetric channel flow of a liquid separated from vapor by a horizontal interface. Two electrode designs are selected for this study: zero drag and non-zero drag electrode configurations. Laminar formulation is utilized for annular flow in the absence of gravity. The electric field and electric body force distributions in axial and radial directions along with flow field and velocity profiles for two electrode designs are presented and fundamentally analyzed. IN addition to the above, similar but limited results are provided for EHD conduction pumping of liquid film in horizontal annular configuration in the presence of gravity. In this case, a k — ε model with near wall treatment is incorporated for turbulence distribution. The electric body force distribution in axial and radial directions and flow pattern are fundamentally illustrated.

Study on Characteristics of Liquid Film Flow and Mass Transfer in Annular Two-Phase Flow

2017 ◽  
Vol 2017.22 (0) ◽  
pp. F112
Author(s):  
Takayuki YAMAGATA ◽  
Minoru KOMATSU ◽  
Nobuyuki FUJISAWA ◽  
Fumio INADA
Keyword(s):  
Mass Transfer ◽  
Liquid Film ◽  
Film Flow ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Liquid Film Flow

Studies on Gas-Phase Turbulence Modification in Vertical Upward Annular Flow

2003 ◽  
Author(s):  
Kenji Yoshida ◽  
Hidenobu Tanaka ◽  
Keizo Matsuura ◽  
Isao Kataoka
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Gas Phase ◽  
Annular Flow ◽  
Film Flow ◽  
Velocity Profiles ◽  
Fluctuation Velocity ◽  
Turbulence Modification ◽  
Liquid Film Flow ◽  
Wavy Interface

Experimental and numerical studies were made to investigate the effects of wavy interface on the liquid film to gas-phase turbulence modification of air-water annular flow in a vertically arranged round tube. By using the constant temperature hotwire anemometer, time-averaged axial velocity profiles, turbulence fluctuation profiles, energy spectrum and auto-correlation coefficient for fluctuation velocity component of gas-phase axial velocity were precisely measured. The liquid film thickness was also measured by using point-electrode resistivity probe to make clear the time-averaged liquid film thickness and wave height moving on the liquid film. Direct observations using high speed video camera were also added to make clear the dynamic behavior and propergating velocity of ripple or disturbance waves on liquid film flow. Numerical simulations for gas-phase turbulence in annular flow considering the effect of wavy interface of liquid film flow were also carried out. Liquid film flow was modeled to be the wall surface roughness of interfacial wave height moving with the interfacial velocity. The roughness and moving velocity of the modeled liquid film for computational condition were provided by the present experimental results. Time-averaged velocity profiles and fluctuation velocity profiles were calculated with standard k-ε model. Numerical results were generally consistent with the experimental results obtained in the present study.

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.

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