Complexity of phase distribution in two-phase flow using composite multiscale entropy Gabriela Rafałko, Romuald Mosdorf, Grzegorz Litak and Grzegorz Górski Eur. Phys. J. Plus, 135 8 (2020) 661 Published online: 17 August 2020 DOI: 10.1140/epjp/s13360-020-00686-0