Contribution
Modelling Microacoustic Devices with the Sequential Linearized Navier Stokes Model
* Presenting author
Abstract:
The abstract is investigating the use of the numerical method Sequential Linearized Navier Stokes (SLNS) for modelling thermal and viscous effects in microacoustic devices as for example a condenser microphone. The SLNS model can be seen as an intermediate step between pressure acoustics and solving the full linearized Navier Stokes equation (FLNS). Therefore, it can enable faster 3D simulations of real devices as compared to FLNS while keeping the important thermal and viscous effects. Thereby SLNS can possibly enable faster modelling of 3D microacoustic devices.The SLNS method solves three sequential Helmholtz equations for the thermal, viscous, and pressure fields. The SLNS model is therefore significantly faster and less memory demanding than the FLNS model, while being slower than classical pressure acoustics. In this contribution the SLNS model is compared to modelling microacoustic systems with both FLNS and pressure acoustics with effective loss models.