Anna Frishman
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View article: Waves drive the rise and fall of 2D flows in rotating turbulence
Waves drive the rise and fall of 2D flows in rotating turbulence Open
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-organizes into large-scale structures. Ordinary three-dimensio…
View article: Self-Replication of Turbulent Puffs: On the edge between chaotic saddles
Self-Replication of Turbulent Puffs: On the edge between chaotic saddles Open
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 self-replication, which must out-compete puff decays to sus…
View article: Out-of-equilibrium fluxes shape the self-organization of locally-interacting turbulence
Out-of-equilibrium fluxes shape the self-organization of locally-interacting turbulence Open
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-equilibrium flux to small scales imposes a constraint on the lar…
View article: Statistics of inhomogeneous turbulence in large-scale quasigeostrophic dynamics
Statistics of inhomogeneous turbulence in large-scale quasigeostrophic dynamics Open
A remarkable feature of two-dimensional turbulence is the transfer of energy from small to large scales. This process can result in the self-organization of the flow into large, coherent structures due to energy condensation at the largest…
View article: Two-Dimensional Turbulence with Local Interactions: Statistics of the Condensate
Two-Dimensional Turbulence with Local Interactions: Statistics of the Condensate Open
International audience
View article: Universality of satellites in the breakup of a stretched fluid bridge
Universality of satellites in the breakup of a stretched fluid bridge Open
As a fluid object breaks, it often leaves behind satellite fragments. Here we show that satellite formation can follow universal dynamics, leading to robust satellite sizes. Specifically, we consider the breakup of a slowly stretched fluid…
View article: Two-dimensional turbulence with local interactions: statistics of the condensate
Two-dimensional turbulence with local interactions: statistics of the condensate Open
Two-dimensional turbulence self-organizes through a process of energy accumulation at large scales, forming a coherent flow termed a condensate. We study the condensate in a model with local dynamics, the large-scale quasi-geostrophic equa…
View article: Mechanism for turbulence proliferation in subcritical flows
Mechanism for turbulence proliferation in subcritical flows Open
The subcritical transition to turbulence, as occurs in pipe flow, is believed to generically be a phase transition in the directed percolation universality class. At its heart is a balance between the decay rate and proliferation rate of l…
View article: Perspectives on viscoelastic flow instabilities and elastic turbulence
Perspectives on viscoelastic flow instabilities and elastic turbulence Open
Viscoelastic fluids are a common subclass of rheologically complex materials that are encountered in diverse fields from biology to polymer processing. Often the flows of viscoelastic fluids are unstable in situations where ordinary Newton…
View article: Mechanism for turbulence proliferation in subcritical flows
Mechanism for turbulence proliferation in subcritical flows Open
The subcritical transition to turbulence, as occurs in pipe flow, is believed to generically be a phase transition in the directed percolation universality class. At its heart is a balance between the decay rate and proliferation rate of l…
View article: Dynamical landscape of transitional pipe flow
Dynamical landscape of transitional pipe flow Open
The transition to turbulence in pipes is characterized by a coexistence of laminar and turbulent states. At the lower end of the transition, localized turbulent pulses, called puffs, can be excited. Puffs can decay when rare fluctuations d…
View article: Raw data and figure scripts from Mechanism for turbulence proliferation in subcritical flows
Raw data and figure scripts from Mechanism for turbulence proliferation in subcritical flows Open
The subcritical transition to turbulence, as occurs in pipe flow, is believed to generically be a phase transition in the directed percolation universality class. At its heart is a balance between the decay rate and proliferation rate of l…
View article: Dynamical landscape of transitional pipe flow
Dynamical landscape of transitional pipe flow Open
The transition to turbulence in pipes is characterized by a coexistence of laminar and turbulent states. At the lower end of the transition, localized turbulent pulses, called puffs, can be excited. Puffs can decay when rare fluctuations d…
View article: Learning active nematics one step at a time
Learning active nematics one step at a time Open
Respiratory virus infections in humans are a significant global health concern, causing a wide range of diseases with substantial morbidity and mortality worldwide. This underscores the urgent need for effective interventions to reduce the…
View article: Genetic Variation in Toll-Like Receptor 5 and Colonization with Flagellated Bacterial Vaginosis-Associated Bacteria
Genetic Variation in Toll-Like Receptor 5 and Colonization with Flagellated Bacterial Vaginosis-Associated Bacteria Open
Bacterial vaginosis (BV) is a vaginal dysbiotic condition linked to negative gynecological and reproductive sequelae. Flagellated bacteria have been identified in women with BV, including Mobiluncus spp. and BV-associated bacterium-1 (BVAB…
View article: Turbulence Statistics in a Two-Dimensional Vortex Condensate
Turbulence Statistics in a Two-Dimensional Vortex Condensate Open
Disentangling the evolution of a coherent mean-flow and turbulent fluctuations, interacting through the nonlinearity of the Navier-Stokes equations, is a central issue in fluid mechanics. It affects a wide range of flows, such as planetary…
View article: Turbulence Statistics in a Two-Dimensional Vortex Condensate
Turbulence Statistics in a Two-Dimensional Vortex Condensate Open
International audience
View article: The culmination of an inverse cascade: Mean flow and fluctuations
The culmination of an inverse cascade: Mean flow and fluctuations Open
Two dimensional turbulence has a remarkable tendency to self-organize into large, coherent structures, forming a mean flow. The purpose of this paper is to elucidate how these structures are sustained and what determines them and the fluct…
View article: The culmination of an inverse cascade: mean flow and fluctuations
The culmination of an inverse cascade: mean flow and fluctuations Open
Two dimensional turbulence has a remarkable tendency to self-organize into large, coherent structures, forming a mean flow. The purpose of this paper is to elucidate how these structures are sustained, and what determines them and the fluc…
View article: Jets or vortices—What flows are generated by an inverse turbulent cascade?
Jets or vortices—What flows are generated by an inverse turbulent cascade? Open
An inverse cascade - energy transfer to progressively larger scales - is a\nsalient feature of two-dimensional turbulence. If the cascade reaches the\nsystem scale, it creates a coherent flow expected to have the largest available\nscale a…