FLiP: FLuids and Plasmas

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FLiP: FLuids and Plasmas

FLiP: FLuids and Plasmas

@flipdfuba

We are a research group based at @Fisica_UBA @Exactas_UBA. We are interested in turbulence, fluid dynamics, plasma physics and soft matter.

Buenos Aires, Argentina Katılım Ekim 2024
192 Takip Edilen175 Takipçiler
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
This is the official X account of the Fluids and Plasma group at @Fisica_UBA @Exactas_UBA. We share our latest research, publications, and activities. For more details, check our website (linked in bio). Stay tuned for updates!
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FLiP: FLuids and Plasmas
For large enough perturbations, the dynamics become much faster and fully nonlinear. At sufficiently large Reynolds and perturbation amplitude, the flow reaches a turbulent steady state; otherwise, it relaminarizes.
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
These results show that turbulence organizes into two layers of dynamics: large scales set the number of unstable directions and small scales add nonlinear complexity without new instabilities. Moreover, degrees of freedom scale with the forcing scale, not the number of modes.
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
How many degrees of freedom does turbulence truly have? @melivinograd, @joaquin_cullen, @patriciocdl show that 2D Kolmogorov flow undergoes two sharp transitions. Sweeping across Reynolds number and forcing scale wavenumber, both transitions collapse at the same forcing Reynolds.
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
The topological features of the flow are imprinted on particle trajectories. Via the local crossing density it is possible to resolve the chiral spatial structure, voxel by voxel, straight from lagrangian data.
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
This implies that, in order to model volcanic plumes and related hazards, humidity–turbulence–particle coupling is needed. Dry turbulence assumptions miss key physics. Link to the article: nature.com/articles/s4159…
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
The authors combine simulations and observational analysis to show that particle dynamics are tightly coupled to turbulent fluctuations, not just mean flow properties.
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
🌋 @ZFlorenciaN, @MininniPablo with Ravichandran, Cimarelli and Ichihara published a study of turbulence and particle dynamics in volcanic clouds, focusing on how humidity changes the flow physics and particle behavior in these highly transient environments. 🗻
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
🌊 On friday, Ignacio defended his Master’s thesis on experimental wave turbulence and is now starting his PhD, all under @PabloCobelli's supervision. Congratulations!
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FLiP: FLuids and Plasmas
FLiP: FLuids and Plasmas@flipdfuba·
The work also analyzes the thermodynamics of particle trajectories. Entropy production along trajectories satisfies the Integral Fluctuation Theorem and, under certain conditions, the Detailed Fluctuation Theorem, linking stochastic thermodynamics with turbulent transport.
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