The Monte Carlo Simulation of a Model Microactuator Driven by Rarefied Gas Thermal Effects

被引：0

作者：

He, Ying ^{[1
]}

Stefanov, S. K. ^{[2
]}

Ota, Masahiro ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, 1-1 Minami Osawa, Tokyo 1920397, Japan

[2] Bulgarian Acad Sci, Inst Mech, BU-1113 Sofia, Bulgaria

来源：

RAREFIED GAS DYNAMICS | 2009年 / 1084卷

关键词：

rotating MEMS; rarefied gas; DSMC;

D O I：

暂无

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A computational model of a rotating microactuator with a four blade rotor system immersed in a low density gas is analyzed by using DSMC method. The rotor system is rotated by a driving force of rarefied dynamic effects arising around each blade due to the temperature difference between front and rear blade sides created and held by a given source of local gas heating. Three models of microactuators with different design are considered: a rotor system with inclined under certain angle blades with different temperatures of the front and rear surface of cacti blade; a rotor system with inclined blades immersed in low density gas under temperature gradient held between two hot and cold plates, and finally, a rotor system with blades having a fancy surface with anisotropic reflection of the gas molecules. The DSMC analysis is performed at Knudsen numbers (based on the blade size) in the range Kn=0.1 - 0.2 close to the experimentally established values, for which the rotation rate reached its maximum. The results obtained from the simulations convincingly demonstrate that the DSMC approach can be used for a qualitative and quantitative analysis of gas microrotor systems with different design.

引用

页码：281 / +

页数：2