Abstract Based on a LES Euler/Lagrange approach, numerical computations of single bubble rise and bubble swarms in a column were conducted and validated including mass transfer and chemical reactions. Large Eddy Simulation (LES) was used for calculating the fluid flow and modelling turbulence in the carrier phase. Bubble motion was calculated considering all important interfacial forces. A bubble motion dynamic model based on stochastic generation of eccentricity and motion angle is considered, which of course goes beyond the classical point-mass approximation in Lagrangian approaches. Novel composite forces coefficients were applied considering the instantaneous bubble deformation. The effects of bubble dynamics on the mass transfer was modelled by a dynamic Sherwood number. The decay of the volume of CO2 single bubbles rising in water was compared with experimental data. A comparison with experiments for bubble swarms with chemical reaction was also realized and good agreement was found if bubble dynamics is modelled.

中文翻译：

---

考虑传质、化学反应和气泡动力学影响的气泡柱 LES-Euler/Lagrange 建模

摘要 基于LES Euler/Lagrange方法，进行了柱内单气泡上升和气泡群的数值计算，包括传质和化学反应。大涡模拟 (LES) 用于计算流体流动并模拟载流相中的湍流。考虑所有重要的界面力来计算气泡运动。考虑了基于偏心率和运动角度的随机生成的气泡运动动力学模型，这当然超越了拉格朗日方法中的经典点质量近似。考虑到瞬时气泡变形，应用了新的复合力系数。气泡动力学对传质的影响通过动态舍伍德数建模。将水中上升的 CO2 单气泡体积衰减与实验数据进行比较。还实现了与具有化学反应的气泡群实验的比较，如果对气泡动力学进行建模，则会发现良好的一致性。