Generality of CFD-PBM coupled model for simulations of gas-liquid bubble column

ZHANG Huahai; WANG Tiefeng

doi:10.11949/j.issn.0438-1157.20181220

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Generality of CFD-PBM coupled model for simulations of gas-liquid bubble column

Process system engineering | 更新时间：2026-07-24

- Generality of CFD-PBM coupled model for simulations of gas-liquid bubble column
- CIESC Journal Vol. 70, Issue 2, Pages: 487-495(2019)
- 作者机构：
  
  清华大学化学工程系，北京 100084
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181220
  CLC： TQ 021.1
- Received：17 October 2018，
  
  Revised：2018-12-16，
  
  Online First：16 June 2020，
  
  Published：05 February 2019
- 稿件说明：
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张华海, 王铁峰. CFD-PBM耦合模型模拟气液鼓泡床的通用性研究[J]. 化工学报, 2019, 70(2): 487-495

ZHANG Huahai, WANG Tiefeng. Generality of CFD-PBM coupled model for simulations of gas-liquid bubble column[J]. CIESC Journal, 2019, 70(2): 487-495
张华海, 王铁峰. CFD-PBM耦合模型模拟气液鼓泡床的通用性研究[J]. 化工学报, 2019, 70(2): 487-495 DOI： 10.11949/j.issn.0438-1157.20181220.

ZHANG Huahai, WANG Tiefeng. Generality of CFD-PBM coupled model for simulations of gas-liquid bubble column[J]. CIESC Journal, 2019, 70(2): 487-495 DOI： 10.11949/j.issn.0438-1157.20181220.

摘要

通过对不同操作压力和不同液体性质气液鼓泡床的模拟值与实验数据进行对比，从而验证CFD-PBM耦合模型的通用性。结果表明，CFD-PBM耦合模型在加入了气泡破碎修正因子后，可以很好地预测压力对鼓泡床流体力学行为的影响趋势，当压力升高时，气含率显著升高。不同液体黏度和表面张力条件下CFD-PBM耦合模型的模拟结果与实验结果均吻合较好。随液体黏度增大，气泡破碎速率减小，气泡尺寸分布变宽，曳力显著下降，气含率随之降低。随表面张力减小，气泡破碎速率增大，气泡变小，气含率升高。CFD-PBM耦合模型具有很好的通用性，原因在于考虑了压力、液体黏度和表面张力对气泡聚并、破碎和气液相间作用力的影响。

Abstract

The generality of the CFD-PBM coupled model was studied by comparing the simulation results with experimental data under different operating pressures and liquid properties. The results show that the CFD-PBM coupled model with the modified pressure factor obtained from the internal-flow bubble breakup model can well predict the influence trend of pressure on the hydrodynamics of bubble column. The gas holdup increases significantly with increasing pressure. In addition

the simulation results for different liquid viscosity and surface tension are consistent with the experimental results. With increasing liquid viscosity

the bubble breakup rate decreases

which leads to a wider bubble size distribution

lower drag correction factor and decreased gas holdup. As the surface tension decreases

the bubble breakup rate increases

which results in smaller bubbles and higher gas holdup. The CFD-PBM coupling model has good versatility because it considers the effects of pressure

liquid viscosity and surface tension on bubble coalescence

fracture and gas-liquid interaction.

关键词

Keywords

references

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