计及气泡诱导与剪切湍流的气泡破碎、湍流相间扩散及传质模型

In the gas-liquid bubbling flow represented by the bubble column, there are two turbulence mechanisms, the bubble induced turbulence (BIT) and the shear turbulence, and they both compete and work together in different time and space ranges. There are uncertainties remain in how BIT affects the bubble breakage and coalescence, the interphase interaction forces and the mass transfer, due to the limited understanding of the BIT energy spectrum. Considering the joint effects of bubble-induced turbulence and shear turbulence, we proposed the bubble breakage model and the turbulence dispersion force model in dealing with the global or the local dominance of BIT. For different operating conditions, these models have performed well in capturing the dynamic behaviors of both the gas- and the liquid-phase, which offers fresh insights into understanding the mechanisms of the interphase mass transfer process in the gas-liquid bubbly flows.