2 papers
physics.flu-dyn2026
Multiscale quasi time-periodic coherent structures in shear flows
Runjie Song, Kengo Deguchi, Genta Kawahara +1
Attempts to disentangle shear-flow turbulence often focus on identifying relatively simple solutions, such as travelling waves or periodic orbits. We show, however, that capturing…
physics.flu-dyn2026
Beyond secondary instability: on the emergence of finite-amplitude waves in Görtler vortices
Runjie Song, Kengo Deguchi
Görtler vortices developing over a concave wall support rapidly oscillating wavelike disturbances through secondary instabilities. Although experiments indicate that the finite-amp…