| Summary: | 碩士 === 淡江大學 === 機械與機電工程學系 === 92 === In this paper, the direct simulation Monte Carlo has been applied to compute 3-D Low-speed Micro-channel Flows, then compare with the difference in 2-D and 3-D flows. Variation of the Knudsen number is obtained by change the inlet pressure while keeping the pressure ratio. The effects of varying Knudsen number on flow property were investigated. The VHS model and Nitrogen has been applied.
The result shows that simulation of 3-D differs a lot from 2-D. In the velocity distribution, the result of the 3-D is lower than 2-D,about only 65% of 2-D,because the friction of the wall. In addition, compare to the different inlet pressure case, wall slip velocity increase and inner velocity decrease along the enhanced rarefaction. On the analysis of heat flux, the result of 3-D is larger then 2-D, but not distinct with high Knudsen number.
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