3 papers
physics.flu-dyn2026
Similarity of start-up flow in porous media for large pressure gradients
Yoshiyuki Sakai, Lukas Unglehrt, Michael Manhart
We investigate the start-up flows through ordered porous media (hexagonal close-packed, face-centred cubic and body-centred sphere packs) by means of direct numerical simulations.…
physics.flu-dyn2026
How is the free surface influence transported in turbulent open channel flows?
Yoshiyuki Sakai, Christian Bauer
We investigate how the influence of a free surface is transported in turbulent open channel flow by analysing matched open- and closed-channel direct numerical simulations up to $R…
physics.flu-dyn2025
How far does the influence of the free surface extend in turbulent open channel flow?
Christian Bauer, Yoshiyuki Sakai, Markus Uhlmann
Turbulent open channel flow is known to feature a multi-layer structure near the free surface. In the present work we employ direct numerical simulations considering Reynolds numbe…