Experimental flow pattern map, slippage and time–frequency representation of oil–water two-phase flow in horizontal small diameter pipes

2015 ◽  
Vol 76 ◽  
pp. 168-186 ◽  
Author(s):  
Lu-Sheng Zhai ◽  
Ning-De Jin ◽  
Yan-Bo Zong ◽  
Qing-Yang Hao ◽  
Zhong-Ke Gao
Keyword(s):  
Flow Pattern ◽  
Two Phase Flow ◽  
Small Diameter ◽  
Phase Flow ◽  
Two Phase ◽  
Time Frequency ◽  
Flow Pattern Map ◽  
Frequency Representation ◽  
Oil Water

Measuring Flow Pattern Asymmetry of Oil-Water Two Phase Flows Using Multi-channel Rotating Electric Field Conductance Signals

2018 ◽  
Vol 74 (1) ◽  
pp. 25-41 ◽  
Author(s):  
Yuansheng He ◽  
Yingyu Ren ◽  
Yunfeng Han ◽  
Ningde Jin
Keyword(s):  
Electric Field ◽  
Flow Pattern ◽  
Cross Section ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Time Asymmetry ◽  
Pipe Cross Section ◽  
Multi Scale ◽  
Oil Water

AbstractThe present study is a report on the asymmetry of dispersed oil phase in vertical upward oil-water two phase flow. The multi-channel signals of the rotating electric field conductance sensor with eight electrodes are collected in a 20-mm inner diameter pipe, and typical images of low pattern are captured using a high speed camera. With the multi-channel rotating electric field conductance signals collected at pipe cross section, multi-scale time asymmetry (MSA) and an algorithm of multi-scale first-order difference scatter plot are employed to uncover the fluid dynamics of oil-water two phase flow. The results indicate that MSA can characterise the non-linear behaviours of oil-water two phase flow. Besides, the MSA analysis also beneficial for understanding the underlying inhomogeneous distribution of the flow pattern in different directions at pipe cross section.

Influence of horizontal return bend on the two-phase flow pattern in small diameter tubes

2004 ◽  
Vol 28 (2-3) ◽  
pp. 145-152 ◽  
Author(s):  
Chi-Chung Wang ◽  
Ing Youn Chen ◽  
Yung-Wei Yang ◽  
Robert Hu
Keyword(s):  
Flow Pattern ◽  
Two Phase Flow ◽  
Small Diameter ◽  
Phase Flow ◽  
Two Phase

Flow Boiling in Horizontal Tubes: Part 1—Development of a Diabatic Two-Phase Flow Pattern Map

1998 ◽  
Vol 120 (1) ◽  
pp. 140-147 ◽  
Author(s):  
N. Kattan ◽  
J. R. Thome ◽  
D. Favrat
Keyword(s):  
Flow Pattern ◽  
Two Phase Flow ◽  
Flow Boiling ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Parameters ◽  
Horizontal Tubes ◽  
Flow Pattern Map ◽  
Wide Range ◽  
Data Points

An improved two-phase flow pattern map is proposed for evaporation in horizontal tubes. The new map was developed based on flow pattern data for five different refrigerants covering a wide range of mass velocities and vapor qualities. The new map is valid for both adiabatic and diabatic (evaporating) flows and accurately identifies about 96 percent of the 702 data points. In addition, the new flow pattern map includes the prediction of the onset of dryout at the top of the tube during evaporation inside horizontal tubes as a function of heat flux and flow parameters.

scholarly journals The nonlinear analysis of horizontal oil-water two-phase flow in a small diameter pipe

2017 ◽  
Vol 92 ◽  
pp. 39-49 ◽  
Author(s):  
Lu-Sheng Zhai ◽  
Panagiota Angeli ◽  
Ning-De Jin ◽  
Da-Shi Zhou ◽  
Lei Zhu
Keyword(s):  
Nonlinear Analysis ◽  
Two Phase Flow ◽  
Small Diameter ◽  
Phase Flow ◽  
Two Phase ◽  
Diameter Pipe ◽  
Oil Water
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