Simulation of an aerodynamic profile with sections of ad hoc concavity Irina Pocebneva, Yuri Deniskin, Alexandr Yerokhin, Viktor Artiukh and Vladimir Vershinin E3S Web Conf., 110 (2019) 01074 Published online: 09 August 2019 DOI: 10.1051/e3sconf/201911001074