A first coherent structure in elasto-inertial turbulence
Yves Dubief, Jacob Page, Rich R. Kerswell, Vincent E., Terrapon, Victor Steinberg
TL;DR
This paper identifies a coherent arrowhead structure in elasto-inertial turbulence through 2D simulations, offering new insights into polymer-flow interactions and energy transfer mechanisms.
Contribution
It introduces the first observation of a steady arrowhead structure in EIT, advancing understanding of flow dynamics and polymer interactions in turbulence.
Findings
Discovery of a steady arrowhead structure in EIT
Insights into elastic and turbulent kinetic energy transfer
Characterization of flow regimes from chaos to steady waves
Abstract
Two dimensional channel flow simulations of FENE-P fluid in the elasto-inertial turbulence regime reveal distinct regimes ranging from chaos to a steady travelling wave which takes the form of an arrowhead structure. This coherent structure provides new insights in the polymer/flow interactions driving EIT, which are observed in a set of controlled numerical experiments and the study of transfer between elastic and turbulent kinetic energy.
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