CFD-VOF-DPM simulations of bubble rising and coalescence in low hold-up particle-liquid suspension systems

CFD-VOF-DPM simulations of bubble rising and coalescence in low hold-up particle-liquid suspension systems
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低滞留颗粒-液体悬浮系统中气泡上升和聚结的 CFD-VOF-DPM 模拟

DOI:
10.1016/j.powtec.2018.08.041
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发表时间:
2018-11
期刊:
影响因子:
5.2
通讯作者:
Luo Zheng-Hong
Luo Zheng-Hong
中科院分区:
工程技术2区
文献类型:
--
作者:
Liu Qi;Luo Zheng-Hong

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CFD-VOF-DPM 组合方法已用于模拟低滞留颗粒-液体悬浮系统中的气泡上升和聚结现象。液体被认为是主相,而颗粒被认为是离散相。气泡或气泡块被视为使用 VOF 方法建模的气相。在网格和时间步长独立性分析的基础上,经实验结果验证,该组合方法能够准确预测流体动力学,且误差较小。随后,对三相流体动力学进行了系统研究和深入讨论。
A combined CFD–VOF–DPM method has been used to simulate bubble rising and coalescence phenomenon in low hold-upparticle–liquid suspension systems. The liquid is considered as the primary phase, while particles are considered as the discrete phase. Bubbles or bubble parcels are regarded as the gas phase modeled using the VOF method. On the basis of the independence analysis of grid and time-step sizes, the combined method predicts fluid dynamics accurately with slight discrepancy according to the validation with experimental results. Subsequently, three-phase hydrodynamics are systematically investigated and thoroughly discussed.
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