计算物理 ›› 2001, Vol. 18 ›› Issue (6): 507-510.
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秦丰华, 孙德军, 尹协远
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QIN Feng-hua, SUN De-jun, YIN Xie-yuan
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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.
关键词: DSMC, 微管道, Knudsen数, 可压缩性, 稀薄气体效应
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.
Key words: DSMC, microchannel, Knudsen numer, Compressibility, rarefied effect
中图分类号:
V211
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.
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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http://www.cjcp.org.cn/CN/Y2001/V18/I6/507