[en] Two-dimensional channel flow simulations of FENE-P (finitely extensible nonlinear elastic-Peterlin) fluid in the elasto-inertial turbulence (EIT) regime reveal distinct regimes ranging from chaos to a steady traveling wave which takes the form of an arrowhead structure. This coherent structure provides insights into the polymer/flow interactions driving EIT. A set of controlled numerical experiments and the study of transfer between elastic and turbulent kinetic energies highlight the role of small- and large-scale dynamics in the self-sustaining cycle of chaos in EIT flows.
Disciplines :
Mechanical engineering
Author, co-author :
Dubief, Yves
Page, Jacob; University of Edinburgh [UK] > School of Mathematics
Kerswell, Richard R.; University of Cambridge [UK] > Applied Mathematics and Theoretical Physics
Terrapon, Vincent ; Université de Liège - ULiège > Département d'aérospatiale et mécanique ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Modélisation et contrôle des écoulements turbulents
Steinberg, Victor; Weizmann Institute of Science > Physics of Complex Systems
Language :
English
Title :
First coherent structure in elasto-inertial turbulence
Publication date :
01 July 2022
Journal title :
Physical Review Fluids
ISSN :
2469-9918
eISSN :
2469-990X
Publisher :
American Physical Society, College Park, United States - Maryland
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