TY - GEN
T1 - LES-stochastic coupling model of bubble-laden turbulence
AU - Niida, Y.
AU - Mitobe, Y.
AU - Watanabe, Y.
PY - 2010/9/10
Y1 - 2010/9/10
N2 - A two-way stochastic sub-grid bubble model is applied to Large Eddy Simulation (LES) for computing advection and diffusion processes of buoyant air bubbles via turbulence-bubble interactions. The model has been validated through comparisons with previous experiments for bubble rise velocity and fluid turbulence in bubble plumes. It is found that a major feature of the bubble-laden turbulent flow is featured by recursive momentum exchanges between the bubbles and fluid around them - the bubble motion intensifies the fluid turbulence, which also enhances dispersions of the bubbles owing to the intensified turbulence diffusion.
AB - A two-way stochastic sub-grid bubble model is applied to Large Eddy Simulation (LES) for computing advection and diffusion processes of buoyant air bubbles via turbulence-bubble interactions. The model has been validated through comparisons with previous experiments for bubble rise velocity and fluid turbulence in bubble plumes. It is found that a major feature of the bubble-laden turbulent flow is featured by recursive momentum exchanges between the bubbles and fluid around them - the bubble motion intensifies the fluid turbulence, which also enhances dispersions of the bubbles owing to the intensified turbulence diffusion.
KW - Air bubble
KW - Large Eddy Simulation
KW - Stochastic model
UR - http://www.scopus.com/inward/record.url?scp=77956310603&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77956310603&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77956310603
SN - 9781880653777
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 750
EP - 754
BT - Proceedings of the 20th (2010) International Offshore and Polar Engineering Conference, ISOPE-2010
T2 - 20th International Offshore and Polar Engineering Conference, ISOPE-2010
Y2 - 20 June 2010 through 25 June 2010
ER -