Effect of oscillation mode on the free-molecule squeeze-film air damping
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AbstractA 3D Monte Carlo (MC) simulation approach is developed and employed to study the effect of the oscillation mode on the squeeze-film air damping in the free-molecule regime. By tracking individual gas molecule's motion and its interaction with the resonator, the MC approach is by far the most accurate modeling approach for the modeling of squeeze-film damping in the free-molecule regime. The accuracy of this approach is demonstrated on several cases in which either analytical solutions or experimental measurements are available. It has been found that unlike the case when resonators oscillate in an unbounded domain, squeeze film damping is very sensitive to the mode shape, which implies that some of the existing modeling approaches based on rigid-resonator assumption may not be accurate when applied to model resonators oscillating at their deformed shape. ©2010 IEEE.
CitationGang Hong, Wenjing Ye (2010) Effect of oscillation mode on the free-molecule squeeze-film air damping. 2010 IEEE 5th International Conference on Nano/Micro Engineered and Molecular Systems. Available: http://dx.doi.org/10.1109/NEMS.2010.5592237.
SponsorsThis publication is based on work supported in part by AwardNo. SA-C0040/UK-C0016, made by King Abdullah Universityof Science and Technology, and in part by Hong KongResearch Grants Council under Competitive EarmarkedResearch Grant 622109. We would like to thank the ChineseInternational NEMS Network for providing the travel supportto Gang Hong for attending the IEEE-NEMS2010 conference.