TY - GEN
T1 - Effects of particle density on gas-liquid-solid flows in bubble columns
AU - Zhang, Xinyu
AU - Ahmadi, Goodarz
N1 - Publisher Copyright:
Copyright © 2014 by ASME.
PY - 2014
Y1 - 2014
N2 - A numerical simulation is performed to study the effects of particle density on gas-liquid-solid flows in bubble columns. An Eulerian-Lagrangian model is used where the liquid flow is modeled by a volume-averaged system of governing equations and motions of particles and bubbles are modeled by Lagrangian trajectory method. Interactions between particle-particle, bubble-bubble, bubble-liquid and particle-liquid are included in the study. The drag, lift, buoyancy, and virtual mass forces are evaluated for the particles and bubbles. Particle-particle and bubble-bubble interactions are accounted for by a hard sphere model. The bubble coalescence is also included in this study. The predicted results were compared with the experimental data in a previous work, and satisfied agreement was obtained. Particles with various density are used in different cases. A parcel method is used to account for particle load. The effects of particle density on gas-liquid-solid three-phase flows are discussed based on the comparison of the transient flow characteristics of these gas-liquid-solid three-phase flows. The simulations show that large particle density may result in weak phase mixing in gasliquid-solid three-phase flows in bubble columns.
AB - A numerical simulation is performed to study the effects of particle density on gas-liquid-solid flows in bubble columns. An Eulerian-Lagrangian model is used where the liquid flow is modeled by a volume-averaged system of governing equations and motions of particles and bubbles are modeled by Lagrangian trajectory method. Interactions between particle-particle, bubble-bubble, bubble-liquid and particle-liquid are included in the study. The drag, lift, buoyancy, and virtual mass forces are evaluated for the particles and bubbles. Particle-particle and bubble-bubble interactions are accounted for by a hard sphere model. The bubble coalescence is also included in this study. The predicted results were compared with the experimental data in a previous work, and satisfied agreement was obtained. Particles with various density are used in different cases. A parcel method is used to account for particle load. The effects of particle density on gas-liquid-solid three-phase flows are discussed based on the comparison of the transient flow characteristics of these gas-liquid-solid three-phase flows. The simulations show that large particle density may result in weak phase mixing in gasliquid-solid three-phase flows in bubble columns.
KW - Eulerian-Lagrangian model
KW - Gas-liquid-solid flows
KW - Numerical study
KW - Particle density
UR - http://www.scopus.com/inward/record.url?scp=84919935505&partnerID=8YFLogxK
U2 - 10.1115/FEDSM2014-21082
DO - 10.1115/FEDSM2014-21082
M3 - Conference contribution
AN - SCOPUS:84919935505
T3 - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
BT - Symposia
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels
Y2 - 3 August 2014 through 7 August 2014
ER -