Acoustics modelling of open-cell foam materials from microstructure and constitutive properties

The dynamic relations for highly porous fibrous materials, having analytical expressions viscous drag forces and oscillatory solid-to-fluid heat transfer, are now extended towards open-cell foam materials where the struts of considered to be primarily cylindrical except in region joints. By also including stiffness cell, an entirely analytically-based model is presented acoustics highly-porous, open-celled materials. This approach extremely efficient, requiring only mean cell size, strut diameter, constitutive properties solid material surrounding fluid as input. acoustic performance prediction not isotropic designs, but anisotropic ones may performed rapidly virtually, without need determination poroelastic from existing samples. steps required development foam-cell presented, along with a typical Melamine yielding very promising results comparison against measurements. In order understand suitability assumption, force square triangular cross-sectional profiles presented.