| 粗糙度对大高宽比槽道内流动影响的数值模拟 |
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| 引用本文： | 刘东,蒋斌,刘明侯. 粗糙度对大高宽比槽道内流动影响的数值模拟[J]. 计算物理, 2013, 30(5): 759-765 |
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| 作者姓名： | 刘东 蒋斌 刘明侯 |
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| 作者单位： | 1. 西南科技大学土木工程与建筑学院, 绵阳 621010;2. 中国科学技术大学热科学和能源工程学院, 合肥 230027 |
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| 基金项目： | 国家自然科学基金(51306156);四川省教育厅资助科研项目(11ZA132&11ZB110);西南科技大学博士基金(11zx7159)资助项目 |
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| 摘 要： | 基于确定表面粗糙结构形状的PML模型模拟表面粗糙度对大高宽比小槽道内流动特性的影响,并与3-D模拟结果对比,结果较为一致.基于该模型对不同的流速和不同的粗糙度进行模拟,结果表明:表面粗糙度导致槽道内出现速度线性分布的流动底层.Re数相同时,单位长度压降与相对粗糙度成二次方关系.粗糙单元高度相同时,压降随Re线性增加.
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| 关 键 词： | 小槽道 粗糙度 PML模型 |
| 收稿时间： | 2012-10-08 |
| 修稿时间： | 2013-03-16 |
Numerical Simulation of Surface Roughness Effect in Large Height-Width Ratio Mini-channel Flows |
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| LIU Dong,JIANG Bin,LIU Minghou. Numerical Simulation of Surface Roughness Effect in Large Height-Width Ratio Mini-channel Flows[J]. Chinese Journal of Computational Physics, 2013, 30(5): 759-765 |
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| Authors: | LIU Dong JIANG Bin LIU Minghou |
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| Affiliation: | 1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China;2. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | A PML model based on fixed surface roughness is used in simulation of surface roughness effect on flow in mini-channels. Compared with 3-D simulation, results of pressure drop agree well. With PML model and 3-D model we simulate different flow rates and roughness, it shows that surface roughness results in speed linear flow substrate. Pressure drop and relative roughness follow a secondary power relation as Re number is fixed. Pressure drop increased linearly with Re number as roughness elements is equal. |
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| Keywords: | mini-channel roughness PML model |
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