It is then argued that the attached scales of wall-bounded turbulence are involved in a reverse cascade process that starts from the wall and ends in the bulk flow. On the other hand, the detached scales belong to a direct forward cascade process towards dissipation. Hence, at a given ...
An overview is also provided concerning cascades in other applications such as bounded flows, quantum, relativistic and compressible turbulence, and active matter, together with implications for turbulent modelling. Finally, we present a series of open problems and challenges that future work needs to ...
A new method of modifying the conventional k - ω turbulence model for corner separation is proposed in this paper. The production term in the ω equation is modified using kinematic vorticity considering fluid rotation and deformation in complex geometric boundary conditions. The corner separation flo...
In wall-bounded flows, hairpin vortices are also stretched by the basic shear. Kelvin-Helmholtz and hairpin-type eddies seem then to be the basic coherent ingredients of turbulent-shear flows. In 3D decaying isotropic turbulence, we show again the existence of large coherent vortices corresponding ...
The y+ distribution on the blade surface has a maximum of 1.5, which ensures adequate resolution of near-wall turbulence effects. The perforated plate area exhibits y+ values up to 25 due to heightened shear forces in this region, balancing computational efficiency with acceptable near-wall ...