scholarly journals RANS simulation of bubble coalescence and break-up in bubbly two-phase flows

2016 ◽  
Vol 146 ◽  
pp. 207-225 ◽  
Author(s):  
Marco Colombo ◽  
Michael Fairweather
Keyword(s):  
Bubble Coalescence ◽  
Two Phase Flows ◽  
Two Phase ◽  
Rans Simulation ◽  
Break Up

scholarly journals Numerical investigation on the performance of coalescence and break-up kernels in subcooled boiling flows in vertical channels

2016 ◽  
Vol 9 (2) ◽  
pp. 71-85 ◽  
Author(s):  
Sara Vahaji ◽  
Sherman CP Cheung ◽  
Lilunnahar Deju ◽  
Guan Yeoh ◽  
Jiyuan Tu
Keyword(s):  
Size Distribution ◽  
Bubble Size ◽  
Bubble Dynamics ◽  
Interfacial Area ◽  
Bubble Size Distribution ◽  
Heated Wall ◽  
Bubble Coalescence ◽  
Two Phase ◽  
Interfacial Area Concentration ◽  
Break Up

In order to accurately predict the thermal hydraulic of two-phase gas–liquid flows with heat and mass transfer, special numerical considerations are required to capture the underlying physics: characteristics of the heat transfer and bubble dynamics taking place near the heated wall and the evolution of the bubble size distribution caused by the coalescence, break-up, and condensation processes in the bulk subcooled liquid. The evolution of the bubble size distribution is largely driven by the bubble coalescence and break-up mechanisms. In this paper, a numerical assessment on the performance of six different bubble coalescence and break-up kernels is carried out to investigate the bubble size distribution and its impact on local hydrodynamics. The resultant bubble size distributions are compared to achieve a better insight of the prediction mechanisms. Also, the void fraction, bubble Sauter mean diameter, and interfacial area concentration profiles are compared against the experimental data to ensure the validity of the models applied.

Coalescence and break-up of drops in two-phase flows

1984 ◽  
Vol 10 (2) ◽  
pp. 195-209 ◽  
Author(s):  
A.M. Podvysotsky ◽  
A.A. Shraiber
Keyword(s):  
Two Phase Flows ◽  
Two Phase ◽  
Break Up
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