Exact free surfaces in constant vorticity flows
Vera Mikyoung Hur, Miles H. Wheeler
Abstract
We present an exact solution for periodic travelling waves in two-dimensional, infinitely deep and constant vorticity flows, in the absence of the effects of gravity or surface tension. The shape of the free surface is the same as for Crapper’s celebrated capillary waves in an irrotational flow, but the flow beneath the wave, which is also explicit, is completely different. This confirms a conjecture made by Dyachenko & Hur (J. Fluid Mech., vol. 878, 2019b, pp. 502–521; Stud. Appl. Maths, vol. 142 (2), 2019c, pp. 162–189) and Hur & Vanden-Broeck (Eur. J. Mech. (B/Fluids), 2020, to appear), based on numerical and asymptotic evidence.
Topics & Concepts
VorticityConstant (computer programming)Positive vorticity advectionMechanicsPotential vorticityVorticity equationPhysicsVortexClassical mechanicsComputer scienceProgramming languageFluid Dynamics and Turbulent FlowsFluid Dynamics and Heat TransferFluid Dynamics and Thin Films