| 微管道气体流动的蒙特卡洛直接模拟 |
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| 引用本文： | 秦丰华,孙德军,尹协远.微管道气体流动的蒙特卡洛直接模拟[J].计算物理,2001,18(6):507-510. |
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| 作者姓名： | 秦丰华 孙德军 尹协远 |
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| 作者单位： | 中国科技大学力学和机械工程系, 安徽 合肥 230027 |
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| 基金项目： | 国家自然科学基金(19702017)项目资助 |
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| 摘 要： | 采用蒙特卡洛直接模拟(DSMC)方法,数值模拟了微管道中压力驱动的气体流动,结果表明固壁边界存在速度滑移,稀薄气体效应明显;整个流场温度变化很小,流动马赫数很小,密度、压力流向变化非常大而横向几乎不变;可压缩性导致压力随流向的非线性分布,但这种效应随Knudsen数增大而减弱.
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| 关 键 词： | DSMC 微管道 Knudsen数 可压缩性 稀薄气体效应 |
| 文章编号： | 1001-246X(2001)06-0507-04 |
| 收稿时间： | 2001-01-15 |
| 修稿时间： | 2001年1月15日 |
DSMC FOR GAS FLOWS IN A MICROCHANNEL |
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| QIN Feng-hua,SUN De-jun,YIN Xie-yuan.DSMC FOR GAS FLOWS IN A MICROCHANNEL[J].Chinese Journal of Computational Physics,2001,18(6):507-510. |
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| Authors: | QIN Feng-hua SUN De-jun YIN Xie-yuan |
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| Institution: | Department of Modern Mechanics, Universitiy of Science and Technology of China, Hefei 230027, P R China |
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| Abstract: | Gas flows driven by pressure in a microchannel are computed with the direct simulation Monte Carlo (DSMC) method. The rarefied effect is observed and slip velocity exists at solid boundaries. Temperature is almost constant in the whole flow field. The Mach number of the flow is very low. Density and pressure vary significantly along the channel while they are nearly invariant transversely. Nonlinearity of pressure distribution along the channel due to compressibility is found and reduces as the Knudsen number increases. |
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| Keywords: | DSMC microchannel Knudsen numer Compressibility rarefied effect |
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