Geometrical optics limit of phonon transport in a channel of disclinations Sébastien Fumeron, Bertrand Berche, Fernando Moraes, Fernando A.N. Santos and Erms Pereira Eur. Phys. J. B, 90 5 (2017) 95 Published online: 17 May 2017 DOI: 10.1140/epjb/e2017-70384-5