scholarly journals Film Thickness in Gas-Liquid Two-Phase Flow : 1st Report, Effect of Orifice Inserted into Tube

1977 ◽  
Vol 43 (373) ◽  
pp. 3417-3426 ◽  
Author(s):  
Kotohiko SEKOGUCHI ◽  
Yasushi KAWAKAMI ◽  
Toru FUKANO ◽  
Hideo SHIMIZU
Keyword(s):  
Film Thickness ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Non-Intrusive Optical Validation of Two-Phase Flow Regimes in a Small Diameter Tube

2014 ◽  
Author(s):  
Darin J. Sharar ◽  
Arthur E. Bergles ◽  
Nicholas R. Jankowski ◽  
Avram Bar-Cohen
Keyword(s):  
Film Thickness ◽  
Flow Regime ◽  
Two Phase Flow ◽  
Small Diameter ◽  
Flow Regimes ◽  
Phase Flow ◽  
Two Phase ◽  
Traditional Use ◽  
Adiabatic Flow ◽  
Flow Pattern Identification

A non-intrusive optical method for two-phase flow pattern identification was developed to validate flow regime maps for two-phase adiabatic flow in a small diameter tube. Empirical measurements of film thickness have been shown to provide objective identification of the dominant two-phase flow regimes, representing a significant improvement over the traditional use of exclusively visual and verbal descriptions. Use of this technique has shown the Taitel-Dukler, Ullmann-Brauner, and Wojtan et al. phenomenological flow regime mapping methodologies to be applicable, with varying accuracy, to small diameter two-phase flow.

Film Thickness Prediction in an Annular Two-Phase Flow Through Bends

2010 ◽  
Author(s):  
P. M. Tkaczyk ◽  
H. P. Morvan ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
Ch. Tsitouras
Keyword(s):  
Film Thickness ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Thickness Prediction ◽  
Flow Through

Investigation of Liquid Loading in Gas Well: Simultaneous Measurements of Drop-Size, Film Thickness and Pressure Drop

2010 ◽  
Author(s):  
Mhunir B. Alamu ◽  
Barry J. Azzopardi ◽  
Gerrit P. van der Meulen ◽  
Valente Hernandez-Perez
Keyword(s):  
Pressure Drop ◽  
Film Thickness ◽  
Drop Size ◽  
Two Phase Flow ◽  
Measurement Instrument ◽  
Dominant Frequency ◽  
Internal Diameter ◽  
Phase Flow ◽  
Two Phase ◽  
Frequency Space

The mechanism of atomization of part of the liquid film to form drops in annular two-phase flow is not entirely understood. It has been observed that drop creation only occurs when there are large disturbance waves present on the film interface. Woodmansee and Hanratty [1] observed that ripples on these waves were a precursor to drops. Though it has been reported that drops occur in bursts by Azzopardi [2], all previous drop size or concentration measurements have always been time integrated to simplify data analysis. Dynamic time averaged drop-size measurements are reported for the first time for annular two-phase flow. Experiments were carried out on a 19mm internal diameter vertical pipe with air and water as fluids. Spraytec, a laser diffraction-based, drop size measurement instrument, was used in the data acquisition. Simultaneous time-resolved measurements were made of: film thickness using conductance probes employing a pair of flush mounted rings as electrodes; and pressure gradient. The gas superficial velocity was 13–43 m/s at liquid superficial velocities of 0.05 and 0.15 m/s. Additional tests were carried out with the gas velocity at 14 m/s for liquid superficial velocities of 0.03–0.18 m/s. Though structures are not clearly visible in the signals acquired, they have been analyzed in amplitude and frequency space to yield Probability Density Function (PDF) and to identify the dominant frequency. Cross-correlation between two film thickness probes provides the wave velocities. Based on the signal analysis, links between film thickness, drop concentration and pressure drop have been identified.

scholarly journals Film Thickness in Gas-Liquid Two-Phase Flow : 3rd Report, Effects of Obstacle Length and Gap between Obstacle and Tube Surface

1980 ◽  
Vol 23 (178) ◽  
pp. 545-552
Author(s):  
Yasushi KAWAKAMI ◽  
Hideo SHIMIZU ◽  
Tohru FUKANO ◽  
Kotohiko SEKOGUCHI
Keyword(s):  
Film Thickness ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Tube Surface ◽  
Two Phase

Average liquid film thickness of annular air-water two-phase flow in 8 × 8 rod bundle

2018 ◽  
Vol 73 ◽  
pp. 63-73 ◽  
Author(s):  
Peng Ju ◽  
Xiaohong Yang ◽  
Joshua P. Schlegel ◽  
Yang Liu ◽  
Takashi Hibiki ◽  
...  
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Two Phase Flow ◽  
Liquid Film Thickness ◽  
Phase Flow ◽  
Two Phase ◽  
Rod Bundle

Experimental Investigation of Falling Liquid Film in Vertical Downward Two-Phase Pipe Flow

2012 ◽  
Author(s):  
Jose M. Lopez ◽  
Ram Mohan ◽  
Ovadia Shoham ◽  
Shoubo Wang ◽  
Gene Kouba
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Two Phase Flow ◽  
Liquid Velocity ◽  
Liquid Droplet ◽  
Mineral Oil ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Measurements ◽  
Falling Liquid Film

In this research the hydrodynamics of falling liquid film in a vertical downward two-phase flow (liquid-gas) is experimentally studied. The 4 inch clear PVC test section is 6.1 meters long, with a length to diameter ratio (L/D) of 64. The fluids utilized are compressed air, water, Conosol mineral oil (light oil) and Drake mineral oil (heavy oil). The superficial liquid velocities tested range from 12 to 72 cm/s while the superficial gas velocities range from 0.2 to 29 cm/s. The vertical facility is equipped with the state-of-the-art instrumentation for two-phase flow measurements, the capacitance Wire-Mesh Sensor (WMS), allowing two-phase flow measurements with conducting and non conducting fluids. Experimental results show that the liquid film thickness has a quasi-linear relationship with the superficial liquid velocity for the air-water case. For the air-oil cases, at superficial liquid velocities higher than 50 cm/s, the liquid film thickness trend is affected by the liquid droplet entrainment. Furthermore, it was found that the liquid droplet entrainment increases as the superficial liquid velocity increases or the surface tension decreases. Details of the liquid droplets traveling in the gas core, wave formation, wave breakup and film thickness evolution are observed in the WMS phase reconstruction.

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