The growth mechanism of turbulent bands in channel flow at low Reynolds numbers
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.899
Abstract: In this work, we carried out direct numerical simulations in large channel domains and studied the kinematics and dynamics of fully localised turbulent bands at Reynolds number $Re=750$. Our results show that the downstream end… read more here.
Keywords: reynolds numbers; mechanism; low reynolds; turbulent bands ... See more keywords
Trigger turbulent bands directly at low Reynolds numbers in channel flow using a moving-force technique
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.636
Abstract: Abstract We show a method, for direct numerical simulations, to trigger and maintain turbulent bands directly at low Reynolds numbers in channel flow. The key is to impose a moving localised force which induces a… read more here.
Keywords: bands directly; reynolds numbers; low reynolds; directly low ... See more keywords
Linear and nonlinear optimal growth mechanisms for generating turbulent bands
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2022.168
Abstract: Abstract Recently, many authors have investigated the origin and growth of turbulent bands in shear flows, highlighting the role of streaks and their inflectional instability in the process of band generation and sustainment. Recalling that… read more here.
Keywords: energy; optimal growth; turbulent bands; growth ... See more keywords