Numerical Simulation and Analytical Prediction on the Development of Entrained Air Filament Caused by the Combined Effect of Rotational Field and Free Stream Flow,Industrial & Engineering Chemistry Research

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Numerical Simulation and Analytical Prediction on the Development of Entrained Air Filament Caused by the Combined Effect of Rotational Field and Free Stream Flow
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-06-22 , DOI: 10.1021/acs.iecr.2c00684
Santosh Kumar Panda ₁ , Basanta Kumar Rana ₁

Affiliation

In this study, an attempt has been made to characterize the pattern of entrained air filament inside a liquid bath of high viscosity by employing a fully submerged horizontal rotating solid roller where the lighter phase is allowed to flow uniformly above the bath. The influence of roller rotational speed (ω), depth of submergence (h/D), strength of the crossflow (Re_flow), and fluid pair (Mo) on the entrainment profile has been established numerically to report the physical insights. An open-source Gerris solver has been employed to perform this computational work. We have also described the transient dynamics of the cusp tip for various input pertinent parameters. In addition, both departure of bubbles at the tip of the steady configured cusp and the entrainment rate are predicted for different gas–liquid pairs. Interfacial configurations are also obtained as a consequence of the effect of gravitational pull. Lastly, an analytical analysis predicted successfully the obtaining of the structure of the cusp, and the predictions are quite satisfactory compared to present numerical data.

中文翻译：

旋转场和自由流共同作用引起的夹带气丝发展的数值模拟和解析预测

在这项研究中，已经尝试通过使用完全浸没的水平旋转固体辊来表征高粘度液体浴中夹带的空气细丝的模式，其中较轻的相被允许在浴上方均匀流动。滚筒转速 (ω)、浸没深度 ( h / D )、横流强度 ( Re _flow ) 和流体对 ( Mo) 在夹带剖面上已建立数字以报告物理见解。已采用开源 Gerris 求解器来执行此计算工作。我们还描述了各种输入相关参数的尖端的瞬态动态。此外，对于不同的气液对，预测了稳定配置尖端尖端的气泡离开和夹带率。由于重力的影响，也获得了界面配置。最后，分析分析成功地预测了尖头结构的获得，与目前的数值数据相比，预测结果相当令人满意。

更新日期：2022-06-22

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