Sound propagation in dihedrals made of porous material

Today I wanted to get an idea of how sound propagates in a dihedral made of porous material. I made this little animation and share it with you 🙂 (Dihedral dimensions: base 0.35m, height 0.5m, frequency 250Hz). Arrows represent velocity vectors, points represent particles, red colour is compression, blue colour is rarefaction.