RT Journal Article
ID 2be6d73757043abe
A1 Prasad, Vijay Kumar
A1 Singh, Satya Prakash
A1 Chatterjee, Dipankar
T1 COMPUTATIONAL MODELING OF GAS-BUBBLE FORMATION THROUGH A SINGLE SUBMERGED ORIFICE
JF International Journal of Fluid Mechanics Research
JO FMR
YR 2017
FD 2018-01-22
VO 44
IS 6
SP 533
OP 551
K1 bubble dynamics
K1 coalescence
K1 CLSVOF
K1 VOF
K1 Bond number
K1 Weber number
AB A two-dimensional numerical simulation is carried out to analyze the dynamics of gas-bubble formation from a single
submerged orifice in an immiscible Newtonian liquid under the condition of constant gas inflow rate using a finite
volume based commercial Computational Fluid Dynamics (CFD) solver ANSYS Fluent. Two conditions for the ambient liquid are considered, namely the liquid in quiescent condition and the liquid as a co-flowing stream with the gas.
The full cycle from bubble formation to its detachment and the corresponding dynamics are simulated by using both
the Volume of Fluid method (VOF) and Coupled Level Set and Volume of Fluid method (CLSVOF). Although both
are front capturing techniques of Eulerian family, they possess some distinct properties in themselves. The CLSVOF
method combines the advantages of the level set method with that of the Volume of Fluid method. It is observed that the
CLSVOF method is more successful in predicting the interface sharpness in comparison to the VOF method only. The
study includes: (i) time sequence profile of bubble formation to clearly represent bubble growth, neck formation, and
bubble breakup at given Weber (We), Reynolds (Re), Bond (Bo) numbers, and liquid to gas mean velocity ratio (vr);
(ii) bubble growth history for different vr and at constant Re,We, and Bo; (iii) comparison between results obtained by
VOF and CLSVOF at given vr, We, Re, and Bo; and (iv) bubble size and bubble formation time, and finally the bubble
coalescence phenomenon and technique for its inhibition.
PB Begell House
LK https://www.dl.begellhouse.com/journals/71cb29ca5b40f8f8,11dd865a1d127f8e,2be6d73757043abe.html