Geometrically Non-Linear Vibration of a Cantilever Interacting with Rarefied Gas Flow

Abstract

The work is devoted to study 2D pressure driven rarefied gas flow in a microchannel having an elastic obstacle. The elastic obstacle is clamped at the bottom channel wall and its length is half of the channel height. The gas flow is simulated by Direct Simulation Monte Carlo (DSMC) method applying the advanced Simplified Bernoulli Trial (SBT) collision scheme. The elastic obstacle is modelled as geometrically nonlinear Euler Bernoulli beam. A reduced 3 modes reduction model of the beam is created. The influence of the gas flow on the beam vibration is studied, considering the linear and nonlinear beam theories.

Keywords

• fluid-structure interaction (fsi)
• rarefied gas
• microchannel
• dsmc
• euler-bernoulli beam
• pressure driven flow