On the cover of Phys. Rev. Lett.
Voir en ligne : Polyhedral bubble vibrations, Phys. Rev. Lett., Mariem Boughzala, Olivier Stephan, Emmanuel Bossy, Benjamin Dollet, and Philippe Marmottant
LiPhy Grenoble
Platonic bubble vibrations
publié le
Underwater spherical bubbles are good acoustic resonators but are notoriously difficult to stabilize. Here, to circumvent these limitations bubbles are trapped within 3D-manufactured millimetric open frames having the shape of the five Platonic solids with identical faces (4 to 20 faces). We thus obtained « Platonic bubbles », stabilized during several days. We measured their acoustic vibration under driving, and we observe that their resonance frequency obeys a simple formula in spite of the shape complexity.