Numerical Simulation Methods of MicroBubbles Drag Reduction and Scale Effect

Abstract

Abstract: Abstract： Based on the mixture model, Eulertwofluid model and population balance model, bubble drag reduction using gas injection for the flow over a twodimension flat plate was numerically simulated. Effects of bubble size and gas injection rate on bubble drag reduction and the scale effect were analyzed. The results show that the decrease of bubble size can increase drag reduction which increases along with the increase of gas injection rates within a certain range. When the gas injection rate is too low or too high, drag reduction would decrease. The results obtained by using the population balance model are closer to the experimental data than those obtained by using other models. If Reynolds number increases due to the increase of the plate size, the drag reduction level would decrease.

Key words: Key words： bubble, drag reduction, scale effect, population balance model, numerical simulation

CLC Number:

O 359.1

FU Huipinga,b,LI Jieb. Numerical Simulation Methods of MicroBubbles Drag Reduction and Scale Effect [J]. Journal of Shanghai Jiaotong University, 2016, 50(02): 278-282.

References

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