Intake rate through openings in the side wall of the duct scheme and Chaplygin method of singularities, as well as by the numerical method using Flow3
d software
On steady non-breaking downstream waves and the wave resistance - Stokes' method in
Maklakov & Petrov (J. Fluid Mech., vol. 776, 2015, pp. 290-315), where the properties of the waves have