acoustic impedance – TechConnect Briefs

Acoustic Impedance Elements Modeling Oscillating Gas Flow in Micro Channels

Veijola T., Helsinki University of Technology, FI

Acoustic impedance models for gas flow in rectangular channels are presented. The models include the effect of slightly rarefied gas (slip-flow region) and the fluid inertia effects. An equivalent circuit is presented that implements the [...]

Compact Model for the Squeezed-Film Damping Including the Open Border Effects

Veijola T., Ruokonen K., Tittonen I., Helsinki University of Technology, FI

A numerical model for the squeezed-film damping between moving rigid, rectangular surfaces is presented. The emphasis is on the nontrivial boundary conditions for the flow, accounting for the finite acoustic impedance of the surrounding gas [...]