Effective interfacial area and liquid—side mass transfer coefficient in the upward two-phase flow of gas—liquid mixtures

1978 ◽  
Vol 16 (2) ◽  
pp. 81-88 ◽  
Author(s):  
Tahei Tomida ◽  
Fumio Yusa ◽  
Tatsuya Okazaki
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Two Phase Flow ◽  
Interfacial Area ◽  
Liquid Mixtures ◽  
Phase Flow ◽  
Two Phase

Mass Transfer Coefficient behind an Orifice in Two-phase Flow

2016 ◽  
Vol 2016.21 (0) ◽  
pp. D114
Author(s):  
Takayuki YAMAGATA ◽  
Hidefumi TSURUTA ◽  
Yuhei NISHII ◽  
Nobuyuki Fujisawa ◽  
Fumio INADA
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

scholarly journals Experimental Study and Numerical Simulation of Gas–Liquid Two-Phase Flow in Aeration Tank Based on CFD-PBM Coupled Model

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1569 ◽  
Author(s):  
Liang Dong ◽  
Jinnan Guo ◽  
Jiawei Liu ◽  
Houlin Liu ◽  
Cui Dai
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Two Phase Flow ◽  
Bubble Diameter ◽  
Coupled Model ◽  
Balance Model ◽  
Aeration Tank ◽  
Phase Flow ◽  
Two Phase

Gas–liquid two-phase flow directly determines the efficiency and stability of the aeration tank. In this paper, a gas–liquid two-phase testbed is built to explore the aeration performance and internal flow in an aeration tank, including an inverted-umbrella impeller (immersion depth of 0 mm, rotational speed of 250 r/min). Also, the running process is simulated by computational fluid dynamics (CFD) with a population balance model (PBM), and mass transfer coefficient is compared to the experiment. The experimental results show that there is a big difference in bubble diameter, ranging from 0.4 to 1.6 mm. The simulation shows that the impeller intensely draws air above the free surface into the shallow liquid, and the circulation vortex entrains it to the bottom areas faster. Compared with the experiment, the simulated interfacial area and standard oxygen mass transfer coefficient is 12% more and 3% less, respectively. The results reveal that CFD-PBM coupled model can improve the accuracy of calculation, resulting in the simulation of gas–liquid two-phase flow.

The gas side mass transfer coefficient in the turbulent flow in a packing with a significant dependence of the interfacial area on the density of irrigation

1984 ◽  
Vol 49 (12) ◽  
pp. 2756-2762
Author(s):  
Jan Červenka ◽  
Václav Kolář
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Gas Flow ◽  
Interfacial Area ◽  
Two Phase ◽  
Expanded Metal ◽  
Significant Dependence ◽  
Experimental Values ◽  
Density Of Irrigation

A theoretically derived relationship has been applied for the gas-side mass transfer coefficient to experimental values of kG. The experimental data have been obtained under the two-phase flow of gas and liquid in a plane vertical packing manufactured of the expanded metal sheet. This packing exhibits a significant dependence of the extent of interfacial area, and hence the geometry of the channel available for gas flow, on the density of irrigation.

scholarly journals Experimental investigation of heat transfer performance coefficient in tube bundle of shell and tube heat exchanger in two-phase flow

2014 ◽  
Vol 35 (1) ◽  
pp. 87-98 ◽  
Author(s):  
Marcin Karaś ◽  
Daniel Zając ◽  
Roman Ulbrich
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Tube Bundle ◽  
Limiting Current ◽  
Phase Flow ◽  
Two Phase ◽  
Tube Heat Exchanger

Abstract This paper presents the results of studies in two phase gasliquid flow around tube bundle in the model of shell tube heat exchanger. Experimental investigations of heat transfer coefficient on the tubes surface were performed with the aid of electrochemical technique. Chilton-Colburn analogy between heat and mass transfer was used. Twelve nickel cathodes were mounted on the outside surface of one of the tubes. Measurement of limiting currents in the cathodic reduction of ferricyanide ions on nickel electrodes in aqueous solution of equimolar quantities of K3Fe(CN)6 and K4Fe(CN)6 in the presence of NaOH basic solution were applied to determine the mass transfer coefficient. Controlled diffusion from ions at the electrode was observed and limiting current plateau was measured. Measurements were performed with data acquisition equipment controlled by software created for this experiment. Mass transfer coefficient was calculated on the basis of the limiting current measurements. Results of mass transfer experiments (mass transfer coefficient) were recalculated to heat transfer coefficient. During the experiments, simultaneously conducted was the the investigation of two-phase flow structures around tubes with the use of digital particle image velocimetry. Average velocity fields around tubes were created with the use of a number of flow images and compared with the results of heat transfer coefficient calculations.

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