7 papers
Laminar gaps mirror turbulent puffs in pipe flow
Shai Kapon, Tobias Grafke, Anna Frishman
Pipe flow at intermediate Reynolds numbers, between the laminar and fully turbulent regimes, takes the form of several spatially and temporally intermittent phases in which turbule…
Waves maintain large-scale 2D flows in rotating turbulence and cause their demise
Sébastien Gomé, Anna Frishman
Turbulence follows a few well-known organizational principles, rooted in conservation laws. One such principle states that a system conserving two sign-definite invariants self-org…
Conservation laws, fluxes, and symmetries: lessons from a perturbative approach for self-organized turbulence
Anna Frishman, Sébastien Gomé, Anton Svirsky
Some turbulent flows self-organize into large-scale structures, rather than breaking up into ever-smaller scales. Underpinning this phenomenon is the existence of two sign-definite…
Helicity controls the direction of fluxes in rotating turbulence
Sébastien Gomé, Anna Frishman
Turbulence sustains out-of-equilibrium energy fluxes shaped by conservation laws. Three-dimensional flows conserve energy and sign-indefinite helicity, both being transferred to sm…
Self-Replication of Turbulent Puffs: On the edge between chaotic saddles
Anton Svirsky, Tobias Grafke, Anna Frishman
Pipe flow is a canonical example where turbulence first appears intermittently in space and time, taking the form of localized structures termed puffs. Turbulence spreads via puff…
Out-of-equilibrium fluxes shape the self-organization of locally-interacting turbulence
Anton Svirsky, Anna Frishman
We study the self-organization of turbulence in a geophysically motivated two-dimensional fluid with local interactions. Using simulations and theory, we show that the out-of-equil…