鼓泡床中基于气泡结构的多相反应模型

气固鼓泡床是一个流动、传热/传质和反应多尺度时空耦合的复杂系统。其中介尺度流动结构（如气泡）对于气固相间传递起着关键性的作用。为了准确描述气固流态化系统中的“三传一反”行为，需要在合理物理简化的基础上建立介尺度模型。提出了基于气泡结构的多流体反应模型，考虑了介尺度非均匀结构对于鼓泡床内气固相间反应的影响；定义了基于气泡的反应非均匀因子修正双流体（TFM）传质反应模型，从而使模型更加易用。通过鼓泡床内的臭氧催化分解反应模拟，对模型进行了初步验证，模拟结果与文献结果相符。

Multiphase reaction model based on bubble structures in bubbling bed

Gas-solid bubbling beds embrace complexity coupled by flow, heat/mass transfer and reactions over a wide range of spatial-temporal scales, which meso-scale flow structure, e.g., bubble, plays a critical role on gas-solid transfer. It is necessary to build meso-scale model on the basis of reasonable physical simplification of real processes, for accurate interpretation of heat/mass/momentum transfer and reaction in gas-solid flow systems. A multi-fluid reaction model from bubble structures was proposed with a consideration of effects of non-uniform meso-scale structure on gas-solid reaction in bubbling bed. Further, the mass transfer and reaction model in the two fluid model (TFM) was modified by a defined heterogeneity reaction index, which made the model easier to use. Model was validated through simulation of ozone catalytic decomposition in bubbling bed, showing good agreement with literature data.