# gst: turbulence in viscous binary fluid mixtures induced by interfacial fluctuations.

AA << demonstrate the existence of interface-induced turbulence, an emergent nonequilibrium statistically steady state with spatiotemporal chaos, which is induced by interfacial fluctuations in low-Reynolds-number binary-fluid mixtures. >>️

<< Furthermore (they) demonstrate diffusive behavior at long times, a hallmark of strong mixing in turbulent flows. >>️

Nadia Bihari Padhan, Dario Vincenzi, Rahul Pandit. Interface-induced turbulence in viscous binary fluid mixtures. Phys. Rev. Fluids 9, L122401. Dec 3, 2024. 

https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.9.L122401

Also: fluctuations, turbulence, transition,  in https://www.inkgmr.net/kwrds.html 

Keywords: gst, fluctuations, turbulence, transition 

# life: POTUS race, an extreme RAG-time revisited, they moved from Mr. Bernie to Mr. Donald.

<< In the final New York Times/Siena College national poll in late October, nearly two-thirds of voters said the government was “mostly working to benefit itself and the elites,” rather than “the people and the country.” Eighty-two percent of Trump voters said so, twice as many as Kamala Harris voters. >>

<< The idea resonated in particular with men and younger voters, the poll found — groups that Mr. Trump especially courted in this election and that Mr. Sanders did well with in his Democratic primary campaigns in 2016 and 2020. >>

Claire Cain Miller. How Some Voters Moved From Bernie Sanders to Donald Trump. Dec. 9, 2024. 

https://www.nytimes.com/2024/12/09/upshot/voters-trump-bernie-sanders.html

Also: RAG-time revisited. Notes (quasi-stochastic poetry). Feb 18, 2008. 

(RAG: Ralph, Al, George)

https://inkpi.blogspot.com/2008/02/2152-rag-time-revisited.html

Also: RAG-time, Mr. Donald, in https://www.inkgmr.net/kwrds.html 

Keywords: life, RAG-time, Mr. Donald, POTUS

# gst: apropos of puddles, how to design and stabilize a Leidenfrost puddle

<< Leidenfrost puddles exhibit erratic bubble bursts that release vapor trapped beneath the liquid, becoming amorphous and unstable. (AA) report a method to stabilize and design a Leidenfrost puddle. >>

<< When a thin hydrophilic layer with a suitable design is placed over the liquid, the puddle adopts the layer shape due to adhesive forces and becomes stable. (AA) show a variety of puddle designs with the required layer dimensions to avoid vapor accumulation, as well as wetting and buoyancy conditions. >>

<< With the layer, the puddle evaporation rate increases significantly and can be modified by varying the layer dimensions. Finally, an illustrative use of this method in a cooling process is presented. >>️

F. Pacheco-Vázquez, M. Aguilar-González, L. Victoria-García. Designing Leidenfrost Puddles. Phys. Rev. Lett. 133, 234001. Dec 4, 2024. 

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.234001 

Also: drop, bubble, instability, transition, in https://www.inkgmr.net/kwrds.html 

Keywords: gst, drops, bubbles, instability, transition

# gst: anomalous oscillation modes of (superfluid) pendant droplets; horizontal translation on a flat surface, bouncing off at the corner and vertical oscillations at the edge.

<< Droplets should exhibit various dynamical phenomena when adhered to a surface; not all of them are realized in classical fluids. Visualization of superfluid  4^He (helium-4) pendant droplets revealed that the droplets were horizontally translated on a flat surface, bouncing off at the corner, known as the Noether mode that reflects the translation symmetry. >>️

<< The droplets exhibited another mode in vertical oscillations with high amplitude that included oscillation of the droplet edge. The oscillation period remained constant even as the droplets grew, exhibiting an anomalously weak size dependence. The high mobility of the droplet edges owing to the superfluidity was a crucial factor for the appearance of these anomalous modes. >>️

Keita Onodera, Ryuma Nagatomo, et al. Anomalous Oscillation Modes of Superfluid Pendant Droplets. Phys. Rev. Lett. 133, 216001. Nov 19, 2024.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.216001

Also: drop, droplet, droploid, transition, in https://www.inkgmr.net/kwrds.html 

Keywords: gst, drop, droplet, droploid, transition

# gst: intermittency of bubble deformation in turbulence.

<< The deformation of finite-sized bubbles in intense turbulence exhibits complex geometries beyond simple spheroids as the bubbles exchange energy with the surrounding eddies across a wide range of scales. (AA)  study investigates deformation via the velocity of the most stretched tip of the deformed bubble in three dimensions, as the tip extension results from the compression of the rest of the interface by surrounding eddies. >>

<< The results show that the power spectrum based on the tip velocity exhibits a scaling akin to that of the Lagrangian statistics of fluid elements, but decays with a distinct timescale and magnitude modulated by the Weber number based on the bubble size. This indicates that the interfacial energy is primarily siphoned from eddies of similar sizes as the bubble. >>

<< Moreover, the tip velocity appears much more intermittent than the velocity increment, and its distribution near the extreme tails can be explained by the proposed model that accounts for the fact that small eddies with sufficient energy can contribute to extreme deformation. >>

<< These findings provide a framework for understanding the energy transfer between deformable objects and multiscale eddies in intense turbulence. >>

Xu Xu, Yinghe Qi, et al. Intermittency of Bubble Deformation in Turbulence. Phys. Rev. Lett. 133, 214001. Nov 19, 2024.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.214001

Also: bubble, turbulence, intermittency, in https://www.inkgmr.net/kwrds.html 

Keywords: gst, bubble, turbulence, intermittency

# life: apropos of saliva healers, herd immunity revisited and now hypothetically approachable even within NIH

<< President-elect Donald Trump is tapping Dr. Jay Bhattacharya, a Stanford University health researcher, to be the next director of the National Institutes of Health (NIH). >>

️

<< Bhattacharya was one of three authors of the document (#1). The declaration called for speeding herd immunity by allowing people at low risk to get infected while protecting those most vulnerable, like the elderly. >>

Rob Stein. Trump turns to critic of COVID mandates to run NIH. npr.org. 

Nov 26, 2024. 

https://www.npr.org/sections/shots-health-news/2024/11/26/nx-s1-5195168/nih-bhattacharya-trump-election-2024

<< The most compassionate approach that balances the risks and benefits of reaching herd immunity, is to allow those who are at minimal risk of death to live their lives normally to build up immunity to the virus through natural infection, while better protecting those who are at highest risk. We call this Focused Protection. >>

️

(#1) - Martin Kulldorff, Sunetra Gupta, Jay Bhattacharya. Great Barrington Declaration. Oct 4, 2020. https://gbdeclaration.org/

FonT

From my point of view 'herd immunity'  can be engineered if and only if, even in the case of sars-covid-19 or flu, simultaneous protection is used with an effective, easy available, antiviral drug.

In this regard, a non-compassionate but logical easy approach could be the indirect inhalation of alcohol ~70% already at the first signs of rhinorrhea, as follows:

(-) start self-treatment (spray plus cotton mask):

Mar 20, 2020  https://flashontrack.blogspot.com/2020/03/life-funky-immediate-approach-of.html  

(-) outcomes

Jul 13, 2022  https://flashontrack.blogspot.com/2022/07/life-aproposito-di-1or2achoos-da-wuhan.html  

Oct 4, 2023 https://flashontrack.blogspot.com/2023/10/life-proposito-di-1or2achoos-da-wuhan.html  

Ultimately, here it could hypothesize a case of historic, singular checkmate of 'one against all'. Anzicheforse?

Also: drop, saliva, sars* covid* (aka 1or2achoos), virus, ethno, Mr. Donald, POTUS, tit-for-tat, game, in https://www.inkgmr.net/kwrds.html 

Keywords: life, drop, saliva, saliva healers, herd immunity, sars, mers, 2019ncov, sarscov2, covid19, coronavirus, 1or2achoos, virus, ethno, ethnomedicine, Donald, POTUS, tit-for-tat, game

PS: I couldn't say why, but in certain contexts, the incipit of an answer that the physicist Enrico Fermi https://it.m.wikipedia.org/wiki/Enrico_Fermi  gave to a journalist always comes back to my mind: 'the physics that is done in our laboratory ...' . 

An example of exceptional, clear, even poetic analysis and synthesis skills (in only 8 words).

# gst: apropos of diffusive anomalies, anomalous diffusion of active Brownian particles in responsive elastic gels.

Here, AA << examine via extensive computer simulations the dynamics of SPPs (self-propelled particles) in deformable gellike structures responsive to thermal fluctuations. (AA) treat tracer particles comparable to and larger than the mesh size of the gel. (They) observe distinct trapping events of active tracers at relatively short times, leading to subdiffusion; it is followed by an escape from meshwork-induced traps due to the flexibility of the network, resulting in superdiffusion. >>

AA << thus find crossovers between different transport regimes. (They) also find pronounced nonergodicity in the dynamics of SPPs and non-Gaussianity at intermediate times. The distributions of trapping times of the tracers escaping from “cages” in (..)  quasiperiodic gel often reveal the existence of two distinct timescales in the dynamics. At high activity of the tracers these timescales become comparable. >>

<< Furthermore, (AA) find that the mean waiting time exhibits a power-law dependence on the activity of SPPs (in terms of their Péclet number). (Their) results additionally showcase both exponential and nonexponential trapping events at high activities. Extensions of this setup are possible, with the factors such as anisotropy of the particles, different topologies of the gel network, and various interactions between the particles (also of a nonlocal nature) to be considered. >>

Koushik Goswami, Andrey G. Cherstvy, et al. Anomalous diffusion of active Brownian particles in responsive elastic gels: Nonergodicity, non-Gaussianity, and distributions of trapping times. Phys. Rev. E 110, 044609. Oct 29, 2024.

https://journals.aps.org/pre/abstract/10.1103/PhysRevE.110.044609

Also: particle, random, escape, network, in https://www.inkgmr.net/kwrds.html 

Keywords: gst, particle, random, random walks, escape, network