| 曳力模型对模拟鼓泡塔气含率的影响 |
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| 引用本文： | 吴宗应,杨宁. 曳力模型对模拟鼓泡塔气含率的影响[J]. 化工学报, 2010, 61(11): 2817-2822 |
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| 作者姓名： | 吴宗应 杨宁 |
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| 作者单位： | 西安交通大学能源与动力工程学院化学工程系,陕西,西安,710049;中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190;中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190 |
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| 基金项目： | 国家重点基础研究发展计划项目 |
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| 摘 要： | 引言鼓泡塔由于其良好的传热、传质特性而被广泛用于化工、生物制药、冶金等领域.近年来,计算流体力学(CFD)越来越多地被应用于研究鼓泡塔内部复杂的流体力学状态.然而,如何合理地描述气液相间作用及湍流模型是CFD模拟能够准确复现鼓泡塔内复杂流动状态的关键和难点.
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| 关 键 词： | 计算流体力学 鼓泡塔 曳力模型 分布板 气含率 |
Effect of drag models on simulation of gas hold-up in bubble columns |
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| WU Zongying,YANG Ning. Effect of drag models on simulation of gas hold-up in bubble columns[J]. Journal of Chemical Industry and Engineering(China), 2010, 61(11): 2817-2822 |
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| Authors: | WU Zongying YANG Ning |
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| Abstract: | A transient two-phase and three-dimensional computational fluid dynamics (CFD) simulation within the Eulerian framework has been carried out to investigate the influence of drag models on the radial gas hold-up profile of a bubble column. The effect of the sparger modeling is investigated as well. It can be concluded that:(1)the approximate modeling method for the sparger in this work is capable of reasonably predicting the radial gas holdup profile; (2)the CFD simulation with the Tomiyama’s drag model differs little from the Ishii-Zuber drag model at the low superficial velocity, while at the high gas velocity, the former leads to an over-prediction of the gas hold-up profile; (3)the correction factor of drag coefficient has a larger influence on the radial gas holdup profiles for high superficial gas velocity than low velocity. |
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