| EFFECT OF EMPIRICAL COEFFICIENTS ON SIMULATION IN TWO-SCALE SECOND-ORDER MOMENT PARTICLE-PHASE TURBULENCE MODEL |
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| 作者姓名： | 胡春波 曾卓雄 |
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| 作者单位： | [1]College of Astronautics, Northwestern Polytechnical University, Xi＇an 710072, P. R. China [2]School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, P. R. China |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | A two-scale second-order moment two-phase turbulence model accounting for inter-particle collision is developed, based on the concept of particle large-scale fluctuation due to turbulence and particle small-scale fluctuation due to collision. The proposed model is used to simulate gas-particle downer reactor flows. The computational results of both particle volume fraction and mean velocity are in agreement with the experimental results. After analyzing effects of empirical coefficient on prediction results, we can come to a conclusion that, inside the limit range of empirical coefficient, the predictions do not reveal a large sensitivity to the empirical coefficient in the downer reactor, but a relatively great change of the constants has important effect on the prediction.
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| 关 键 词： | 双相流 二阶力矩模型 双刻度涨落 经验系数 |
| 收稿时间： | 2005-05-27 |
| 修稿时间： | 2006-08-07 |
Effect of empirical coefficients on simulation in two-scale second-order moment particle-phase turbulence model |
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| Chun-bo Hu,Zhuo-xiong Zeng.EFFECT OF EMPIRICAL COEFFICIENTS ON SIMULATION IN TWO-SCALE SECOND-ORDER MOMENT PARTICLE-PHASE TURBULENCE MODEL[J].Applied Mathematics and Mechanics(English Edition),2006,27(11):1491-1497. |
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| Authors: | Chun-bo Hu Zhuo-xiong Zeng |
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| Institution: | 1. College of Astronautics, Northwestern Polytechnical University, Xi'an 710072, P. R. China
2. School of Civil Engineering and Architecture, East China Jiaotong University,Nanchang 330013,P.R.China |
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| Abstract: | A two-scale second-order moment two-phase turbulence model accounting for inter-particle collision is developed, based on the concept of particle large-scale fluctuation due to turbulence and particle small-scale fluctuation due to collision. The proposed model is used to simulate gas-particle downer reactor flows. The computational results of both particle volume fraction and mean velocity are in agreement with the experimental results. After analyzing effects of empirical coefficient on prediction results, we can come to a conclusion that, inside the limit range of empirical coefficient, the predictions do not reveal a large sensitivity to the empirical coefficient in the downer reactor, but a relatively great change of the constants has important effect on the prediction. |
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| Keywords: | two-phase flow second-order moment model two-scale fluctuation empirical coefficients |
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