Bubble Column CFD Model with Effects of Forced Oscillations on Bubble Dynamics,Chemical Engineering & Technology

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Bubble Column CFD Model with Effects of Forced Oscillations on Bubble Dynamics
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-03-19 , DOI: 10.1002/ceat.202000533
Abd Alhamid R. Sarhan _{1,

2} , M.R. Karim ₁ , Jamal Naser ₁

Affiliation

Bubble size distribution has a significant effect on gas holdup, residence time distribution, and mass transfer in bubble column reactors (BCRs). The occurrence of small gas bubbles has potential advantages such as a limited residence time distribution and perfect gas‐liquid phase contact. Gas‐liquid mass transfer in bubble columns can be significantly enhanced by subjecting the liquid phase to low‐frequency vibrations. However, the effect of vibration frequency on bubble formation and hydrodynamic characteristics in BCRs is still not well understood. Herein, a 3D numerical model of a BCR was developed to study the effect of vibration frequency on bubble dynamics under different operating conditions. The Sauter mean bubble diameter was found to be approximately inversely proportional to the vibration frequency.

中文翻译：

强迫振荡对气泡动力学影响的气泡塔CFD模型

气泡大小分布对气泡塔反应器（BCR）中的气体滞留率，停留时间分布和传质有重要影响。小气泡的出现具有潜在的优势，例如有限的停留时间分布和完美的气-液相接触。通过使液相经受低频振动，可以显着增强气泡塔中的气液传质。但是，振动频率对BCR中气泡的形成和流体动力特性的影响仍然知之甚少。本文中，开发了BCR的3D数值模型，以研究振动频率对不同操作条件下气泡动力学的影响。发现索特平均气泡直径与振动频率大致成反比。

更新日期：2021-05-17

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