Coherent structure modification by a shear acting at the surface of a turbulent open channel Sergio Chibbaro, Jair Reyes, Maurice Rossi, Alfredo Soldati and Francesco Zonta Eur. Phys. J. Plus, 138 9 (2023) 799 Published online: 11 September 2023 DOI: 10.1140/epjp/s13360-023-04401-7