Nonlinear dynamics in fluids is a research area focused on the analysis and prediction of fluid flows governed by nonlinear partial differential equations, such as the Navier–Stokes and Euler equations. It investigates phenomena including hydrodynamic instabilities, transition to turbulence, coherent structures, pattern formation, and spatiotemporal chaos across a wide range of Reynolds numbers. Methods commonly involve asymptotic analysis, bifurcation theory, dynamical systems approaches, numerical simulation, and experimental visualization. The field aims to characterize attractors, energy cascades, and multiscale interactions in laminar, transitional, and turbulent regimes, informing modeling, control, and reduced-order descriptions of complex fluid behavior in both natural and engineered systems.
Instead of a tempest in a teapot, imagine the cosmos in a canister. Scientists have performed experiments using nested, spinning cylinders to confirm that an uneven wobble in a ring of electrically conductive fluid like liquid ...
Planetary Sciences
Jul 7, 2025
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75
In the Quantum Mixtures Lab of the National Institute of Optics (Cnr-Ino), a team of researchers from Cnr, the University of Florence and the European Laboratory for Non-linear Spectroscopy (LENS) observed the phenomenon ...
Quantum Physics
Apr 10, 2025
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855
The El Niño-Southern Oscillation (ENSO), the most prominent interannual climate variability signal, has been widely studied for its teleconnections with Antarctic sea ice variability. However, its influence on the predictability ...
Earth Sciences
Mar 13, 2025
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20
A team led by researchers at UNC-Chapel Hill have made an extraordinary discovery that is reshaping our understanding of bubbles and their movement. Picture tiny air bubbles inside a container filled with liquid. When the ...
General Physics
Feb 25, 2025
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282
Water and oil, and some other simple fluids, respond in the same way to all levels of shear stress. These are termed Newtonian fluids, and their viscosity is constant for all stresses although it will vary with temperature. ...
Soft Matter
Oct 28, 2024
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39
An altogether new convective instability has been predicted and experimentally discovered, 140 years after Lord Rayleigh. Convective instabilities are of fundamental importance for both our everyday life as well as for ecology ...
Microplastics are a global problem: they end up in rivers and oceans, they accumulate in living organisms and disrupt entire ecosystems. How tiny particles behave in a current is difficult to describe scientifically, especially ...
General Physics
Aug 12, 2024
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287
When materials are subjected to extreme environments, they face the risk of mixing together. This mixing may result in hydrodynamic instabilities, yielding undesirable side effects. Such instabilities present a grand challenge ...
General Physics
May 13, 2024
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84
Light can compute functions during its propagation and interaction with structured materials, with high speed and low energy consumption. Achieving universal computing using all-optical neural networks requires optical activation ...
Optics & Photonics
Mar 19, 2024
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89
Falling from the tip of a brush suspended in mid-air, an ink droplet touches a painted surface and blossoms into a masterpiece of ever-changing beauty. It weaves a tapestry of intricate, evolving patterns. Some of them resemble ...
Soft Matter
Mar 4, 2024
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181
