Turbulent jets —Cristian Ricardo Constante Amores, Imperial College London

The break of fluid jets is a canonical problem in interfacial singularity two-phase flows due to topology changes. The atomisation regime is difficult to characterise experimentally due to its chaotic and stochastic behaviour due to turbulence. Hence, we have performed three-dimensional Direct Numerical Simulations of turbulent liquid jets (Re ~6520) ensuring that we resolve all the turbulent scales. We observe Kelvin-Helmholtz vortices which deform to hairpin vortical structural close to the interface, visible in the figure.

https://fluids.ac.uk/files/01_Cristian_Ricardo_Constante_Amores_vorticity_c.1589452487.png