| 采用非结构化网格求解颗粒流的一种数值方法 |
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| 引用本文： | 吴春亮,詹杰民.采用非结构化网格求解颗粒流的一种数值方法[J].中山大学学报(自然科学版),2007,46(3):25-29. |
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| 作者姓名： | 吴春亮 詹杰民 |
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| 作者单位： | 中山大学应用力学与工程系，中山大学应用力学与工程系 广东广州510275，广东海洋大学工程学院，广东湛江524088，广东广州510275，中山大学近岸海洋工程广东省重点实验室，广东广州510275 |
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| 摘 要： | 离散颗粒模型是计算稠密颗粒两相流的一种重要模型,该模型通常采用硬球模式描述颗粒间的作用。提出一种在二维非结构化网格下结合硬球模式求解颗粒群运动的数值方法,对颗粒间的碰撞检测策略进行了优化,通过对颗粒采用局部移动的方法大大提高了计算的效率。数值算例显示在颗粒粒径小于网格尺度时,该方法能适应多种类型的网格,这为进一步实现不规则区域下稠密颗粒两相流的数值模拟奠定了基础。
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| 关 键 词： | 非结构化网格 颗粒流 硬球模式 |
| 文章编号： | 0529-6579（2007）03-0025-05 |
| 修稿时间： | 2006-05-25 |
A Numerical Method to Solve Granular Flows Applying Unstructured Meshes |
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| WU Chun-liang,ZHAN Jie-min.A Numerical Method to Solve Granular Flows Applying Unstructured Meshes[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2007,46(3):25-29. |
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| Authors: | WU Chun-liang ZHAN Jie-min |
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| Institution: | 1. Department of Applied Mechanics and Engineering, Sun Yat-sen University, Guangzhou 510275, China; 2. Engineering College, Guangdong Ocean University, Zhanjiang 524088, China; 3. Guangdong Province Key Lab of Coastal Ocean Engineering, Guangzhou 510275, China |
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| Abstract: | The discrete particle model is a very important approach to simulate dense particulate flows and the hard sphere model is often cooperated to describe the particle-particle interactions.A numerical method based on the hard sphere model is presented to simulate granular flows applying unstructured meshes.To speed up the computation,an efficient algorithm for collision searching and a local movement strategy for particle position updating are adopted.Numerical experiments show that the method can be used to simulate 2D granular flows without regard to the cell shape of the mesh given the particle diameter smaller than the cell face.The numerical method presented here gives a good start for future work to simulate dense two-phase flows in complex region applying unstructured meshes. |
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| Keywords: | unstructured mesh granular flow hard-sphere model |
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