| 粗糙微通道内稀薄气体流动与换热的蒙特卡洛直接模拟 |
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| 引用本文： | 林林,王爱国,张欣欣.粗糙微通道内稀薄气体流动与换热的蒙特卡洛直接模拟[J].北京科技大学学报,2010,32(3). |
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| 作者姓名： | 林林 王爱国 张欣欣 |
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| 作者单位： | 1. 北京科技大学机械工程学院,北京,100083
2. 中国科学院工程热物理研究所,北京,100190;中国科学院研究生院,北京,100190 |
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| 摘 要： | 采用Delaunay三角化方法对计算区域进行网格划分,开发了适合于非结构化网格的蒙特卡洛直接模拟程序,并对程序的正确性进行了验证.在此基础上模拟分析了粗糙元为三角形的平行平板间微通道内稀薄气体的二维流动与换热.通道进出口压力固定,上下平板温度恒定.计算分析了粗糙元高度、宽度以及分布密度的影响.结果表明:微通道内粗糙元对流动与换热有明显的扰动;随着粗糙元的变大,速度跳跃显著,甚至出现漩涡,增加了通道内的压力损失;但粗糙元增强了微通道壁面与气体之间的换热.
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| 关 键 词： | 粗糙 微通道 稀薄气体 流动 换热 |
Prediction of flow and heat transfer in rough micro channels with direct simulation Monte Carlo method |
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| LIN Lin,WANG Ai-guo,ZHANG Xin-xin.Prediction of flow and heat transfer in rough micro channels with direct simulation Monte Carlo method[J].Journal of University of Science and Technology Beijing,2010,32(3). |
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| Authors: | LIN Lin WANG Ai-guo ZHANG Xin-xin |
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| Abstract: | The computational domain was meshed by Delaunay triangulation method.A Monte Carlo direct simulation program was developed for unstructured grids and its validity was checked.On that case,the two-dimensional flow and heat transfer of rarefied gas in parallel plate micro-channels with triangular roughness elements were simulated.The pressure of the micro-channels' inlet and outlet and the temperature of the plates above and below were constant.The influences of the height,width and distribution density of ro... |
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| Keywords: | roughness micro-channels rarefied gas flow heat transfer |
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