Computational Fluid Dynamics (CFD) Modeling of Swirling Flows in Industrial Counter-Current Spray-Drying Towers under Fouling Conditions†,Industrial & Engineering Chemistry Research

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Computational Fluid Dynamics (CFD) Modeling of Swirling Flows in Industrial Counter-Current Spray-Drying Towers under Fouling Conditions†
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-21 , DOI: 10.1021/acs.iecr.8b02202
Borja Hernandez _{1,

2} , Blair Fraser ₂ , Luis Martin de Juan ₂ , Mariano Martin ₁

Affiliation

This work presents a novel procedure to predict the airflow pattern under different levels of deposition and Reynolds numbers for swirling-flow industrial-scale spray-drying towers. It improves the accuracy in the prediction of both the hydrodynamics and the effect of the deposition. Initially, steady-state and transient simulations are compared, showing that the model can be reduced to steady state for a certain mesh size. The computational fluid dynamics (CFD) model is later calibrated using the experimental swirl intensity values under different levels of deposits that have reached a dynamic equilibrium. The model then is validated for different Reynolds numbers of operation. Finally, the validated model is applied to examine the vortex behavior and evaluate the effect of the tower radius reduction. A limit of operation is found for low Reynolds numbers, in terms of stability, and it is observed that the momentum cannot be only modeled with the radius reduction.

中文翻译：

结垢条件下工业逆流喷雾干燥塔中旋流的计算流体动力学（CFD）建模†

这项工作提出了一种新颖的方法来预测旋流工业规模喷雾干燥塔在不同沉积水平和雷诺数下的气流模式。它提高了流体动力学和沉积效果预测的准确性。最初，比较了稳态和瞬态仿真，结果表明，对于特定的网格尺寸，可以将模型还原为稳态。随后，使用已达到动态平衡的不同沉积物水平下的实验旋流强度值对计算流体动力学（CFD）模型进行校准。然后针对不同的雷诺数操作验证模型。最后，将经过验证的模型应用于检查涡流行为并评估塔半径减小的效果。

更新日期：2018-08-22

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