The Acoustic-Thermoviscous Acoustic Boundary coupling (
) is used to couple a thermoviscous acoustics domain to a pressure acoustics domain (in both frequency and time domain). This includes both the FEM-based acoustics interfaces and the BEM-based acoustics interface. As it is only necessary to solve the full detailed thermally conducting and viscous model near walls in the boundary layer region, it makes sense to switch to classical pressure acoustics outside this region. This approach saves a lot of memory and solution time due to the reduced number of degrees of freedom.
The thermoviscous acoustic pressure variable is pt and the pressure acoustic pressure is here denoted
for clarity.
See Settings for further details about
Label and
Name.
The default Name (for the first multiphysics coupling feature in the model) is
atb1.