A theoretical model for bubble formation during horizontal gas injection into liquid flow in vertical tubes

2017 ◽  
Vol 39 (10) ◽  
pp. 1435-1441 ◽  
Author(s):  
Qian Huang ◽  
Changjun Li
Keyword(s):  
Theoretical Model ◽  
Liquid Flow ◽  
Bubble Formation ◽  
Gas Injection ◽  
Vertical Tubes

scholarly journals Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 388
Author(s):  
Juanli Zuo ◽  
Fengchao Li ◽  
Ning Zhang ◽  
Denghui He ◽  
Wen Wang ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Flow Rate ◽  
Liquid Flow ◽  
High Speed ◽  
Two Phase Flow ◽  
Liquid Flow Rate ◽  
Bubble Formation ◽  
Phase Flow ◽  
Hydraulic Characteristics ◽  
Two Phase

A pneumatic lifting pump is used in sewage treatment, offshore oil production, and other fields because of its simple structure and strong practicability. In order to study its internal hydraulic characteristics and gas-liquid two-phase flow, this paper carries out experimental research on the influence of different air intake modes and riser diameters on the performance of a pneumatic lifting pump. The air-water two-phase flow pattern in the riser and motion characteristics of bubble formation at the nozzle are obtained by a high-speed camera. Through theoretical analysis, the theoretical model of a pneumatic lifting pump is established, and experimental results verify the theoretical model well. The results show that when the submergence ratio is constant, the lifting efficiency decreases with the smaller intake area under different intake areas; and the influences of different holes distributions on liquid flow rate and lifting efficiency are not significant under the same intake area. At the same submergence ratio, the smaller the riser diameter, the smaller the final lifting liquid flow rate and the larger the lifting efficiency peak value.

Experimental Study of Bubble Behaviour in a Flowing Liquid Layer

2020 ◽  
Author(s):  
Zhengzheng Zhang ◽  
Liangxing Li ◽  
Shuanglei Zhang ◽  
Afnan Saleem
Keyword(s):  
Liquid Layer ◽  
Flow Rate ◽  
Liquid Flow ◽  
Formation Process ◽  
Bubble Formation ◽  
Water Flow Rate ◽  
Nucleation Site ◽  
Flowing Liquid ◽  
Bubble Detachment ◽  
Smooth Channel

Abstract A visualized experimental system is designed and constructed to investigate the bubble dynamic in a flowing liquid layer. Motivated by reducing uncertainties and digging a deep understand on the formation mechanism of boiling bubbles, the bubbles are formed by injecting air through a submerged orifice in our present work, where the influence of thermal physics, nucleation site density and dry spot are stripped. The water flow rate and the air flow rate are in the range of 72–324 ml/min and 0.8–2.0 ml/min, respectively. The bubble formation process in the smooth channel and the rib channel are investigated. The results state that increasing the liquid flow rates lead to the increasing bubble detachment frequency and the decreasing bubble detachment volume. Besides, the larger the liquid flow rate is, the closer the bubble center of mass is to the wall. The rib has a significant influence on the bubble formation process. In the rib channel, it is more difficult for bubbles to detach from the orifice compared that in a smooth channel. Besides, the bubble detachment volume in a rib channel is larger than it in a smooth channel.

Regimes Of Bubble Generation In The Flow Of Viscous Liquid

2015 ◽  
Vol 10 (3) ◽  
pp. 70-75
Author(s):  
Maxim Vorobyev ◽  
Oleg Kashinsky ◽  
Pavel Lobanov ◽  
Aleksandr Chinak
Keyword(s):  
Experimental Study ◽  
Liquid Flow ◽  
Gas Injection ◽  
Bubble Coalescence ◽  
Mixture Formation ◽  
Bubble Generation ◽  
Characteristic Modes ◽  
Liquid Bubble ◽  
Bubble Mixture ◽  
Working Liquid

Data of experimental study of the processes arising at gas injection through a capillary in to the liquid flow are presented. The characteristic modes of gas-liquid bubble mixture formation are investigated. Bubble coalescence near the capillary edge was shown to produce different modes. Glycerol was applied as working liquid. Its heating was made to change physical properties of working liquid.

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