Unraveling the interplay of two counter-rotating helical vortices

Unraveling the interplay of two counter-rotating helical vortices

Alessandro Capone, CNR-INM Institute of Marine Engineering
Francisco Alves Pereira, CNR-INM Institute of Marine Engineering

DOI: https://doi.org/10.1103/APS.DFD.2019.GFM.V0067

The video reports the observation of the interaction between two counter-rotating helical vortices generated by two coaxial propellers. This interaction shows how the two structures exchange vorticity through various processes that are documented by high speed observations. Merging, splitting, reconnection, entrainment, roll-up contribute to distribute the vorticity originating at the blade tips into a coherent vortex wake.

See other videos from the 2019 Gallery of Fluid Motion: https://gfm.aps.org/

Видео Unraveling the interplay of two counter-rotating helical vortices канала APS Physics