Department of Chemical Engineering, College of Engineering, Shahid Bahonar University of Kerman, P.O. Box 76175-133 Kerman, Iran.
J Hazard Mater. 2010 Oct 15;182(1-3):835-41. doi: 10.1016/j.jhazmat.2010.06.115. Epub 2010 Jul 4.
A three-dimensional Eulerian-Lagrangian fluid dynamics (CFD) model was developed to simulate the gas particulate flow inside cyclones with different sizes. Cyclones of different sizes, were used which named as cyclones I, II, and III. Cyclone I was considered as the biggest and cyclone III was considered as the smallest cyclone. The effects of cyclone size and inlet velocity on hydrodynamics behavior and performance parameters including cut-off diameter and pressure drop were investigated. The renormalization group (RNG) k-epsilon model and Reynolds stress model (RSM) were used to study the effect of turbulent modeling. Particle trajectories were calculated via discrete phase model (DPM). The velocity fluctuations were simulated with discrete random walk (DRW) model to study the turbulent dispersion of particles. The cut-off size and pressure drop were increased with increasing the cyclone size. The RSM predicted the cut-off diameter very well with the deviations of 2.3%, 3.4%, and 3.6% of the experimental data, for cyclones I, II, and III, respectively. CFD model was developed using Fluent code to simulate the gas particulate flow inside cyclone. The simulation results also confirmed the applicability of CFD modeling with RSM as a promising tool to study the cyclone size effect on performance parameters.
建立了一个三维欧拉-拉格朗日流体力（CFD）模型，以模拟不同尺寸旋风内的气固两相流。使用了不同尺寸的旋风，分别命名为旋风 I、II 和 III。旋风 I 被认为是最大的，旋风 III 被认为是最小的旋风。研究了旋风尺寸和入口速度对包括截止直径和压降在内的流体动力学行为和性能参数的影响。重整化群（RNG）k-ε模型和雷诺应力模型（RSM）用于研究湍流建模的影响。通过离散相模型（DPM）计算颗粒轨迹。使用离散随机漫步（DRW）模型模拟速度波动，以研究颗粒的湍流扩散。随着旋风尺寸的增加，截止尺寸和压降增加。RSM 很好地预测了截止直径，与实验数据的偏差分别为 2.3%、3.4%和 3.6%，适用于旋风 I、II 和 III。使用 Fluent 代码开发了 CFD 模型，以模拟旋风内的气固两相流。模拟结果还证实了使用 RSM 的 CFD 建模的适用性，这是一种研究旋风尺寸对性能参数影响的有前途的工具。
