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Analysis of fluid‐structure interaction in low pressure MEMS by Integral Equations
Author(s) -
Frangi Attilio
Publication year - 2008
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200810007
Subject(s) - microelectromechanical systems , inertial frame of reference , momentum (technical analysis) , mechanics , boundary (topology) , dissipation , diffusion , integral equation , flow (mathematics) , boundary value problem , momentum transfer , physics , computer science , mechanical engineering , classical mechanics , mathematics , engineering , mathematical analysis , thermodynamics , quantum mechanics , finance , scattering , economics
The evaluation of gas dissipation occurring in inertial polysilicon MEMS is addressed focusing the attention on the free–molecule flow. In this regime, which is very often of interest for industrial applications, collisions between molecules can be neglected and the momentum transfer to the moving shuttle can be easily computed. Since the surfaces of silicon MEMS are generally very rough, a complete diffusion model is adopted to describe the wall–molecule interaction. A Boundary Integral Equation approach is proposed and it is shown that the introduction of the key assumption of small perturbations is crucial in the development of a robust and fast numerical tool. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)