TY - JOUR
T1 - Simulation of bubble breakup dynamics in homogeneous turbulance
AU - Qian, D.
AU - McLaughlin, J. B.
AU - Sankaranarayanan, K.
AU - Sundaresan, Sankaran
AU - Kontomaris, K.
N1 - Funding Information:
This work was supported by the U.S. Department of Energy under Grant DE-FG02-88ER13919 and by a grant from DuPont. We acknowledge the support and facilities of the National Center for Supercomputer Applications at the University of Illinois at Urbana, Illinois. The authors would also like to express their appreciation to Dr. X. Shan for helpful discussions about the lattice Boltzmann method.
PY - 2006/8
Y1 - 2006/8
N2 - This article presents numerical simulation results for the deformation and breakup of bubbles in homogeneous turbulence under zero gravity conditions. The lattice Boltzmann method was used in the simulations. Homogeneous turbulence was generated by a random stirring force that acted on the fluid in a three-dimensional periodic box. The grid size was sufficiently small that the smallest scales of motion could be simulated for the underlying bubble-free flow. The minimum Weber number for bubble breakup was found to be about 3. Bubble breakup was stochastic, and the average time needed for breakup was much larger for small Weber numbers than for larger Weber numbers. For small Weber numbers, breakup was preceded by a long period of oscillatory behavior during which the largest linear dimension of the bubble gradually increased. For all Weber numbers, breakup was preceded by a sudden increase in the largest linear dimension of the bubble. When the Weber number exceeded the minimum value, the average surface area increased by as much as 80%.
AB - This article presents numerical simulation results for the deformation and breakup of bubbles in homogeneous turbulence under zero gravity conditions. The lattice Boltzmann method was used in the simulations. Homogeneous turbulence was generated by a random stirring force that acted on the fluid in a three-dimensional periodic box. The grid size was sufficiently small that the smallest scales of motion could be simulated for the underlying bubble-free flow. The minimum Weber number for bubble breakup was found to be about 3. Bubble breakup was stochastic, and the average time needed for breakup was much larger for small Weber numbers than for larger Weber numbers. For small Weber numbers, breakup was preceded by a long period of oscillatory behavior during which the largest linear dimension of the bubble gradually increased. For all Weber numbers, breakup was preceded by a sudden increase in the largest linear dimension of the bubble. When the Weber number exceeded the minimum value, the average surface area increased by as much as 80%.
KW - Bubble breakup
KW - Multiphase flow
KW - Numerical simulation
KW - Turbulence
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U2 - 10.1080/00986440500354275
DO - 10.1080/00986440500354275
M3 - Article
AN - SCOPUS:33645794770
SN - 0098-6445
VL - 193
SP - 1038
EP - 1063
JO - Chemical Engineering Communications
JF - Chemical Engineering Communications
IS - 8
ER -