Foams flow by stick and slip

Article Abstract:

Foam flow arises through topological rearrangements of bubble positions that have characteristics similar to that of non-linear dynamics of avalanches and the intermittent stick-slip dynamics of earthquakes. The bubbles exhibit an intermittent stick-slip motion. Numerical simulations consider the interaction between bubble neighbors and include the critical length scale controlling the dynamics of a foam. Experiments using imaging techniques that use multiply scattered light to study the bulk of a foam compare well with numerical simulations.

Analysis, Usage, Fluid dynamics, Foam, Foams (Chemistry), Numerical calculations

---

Diffusion in a different direction

Article Abstract:

The unusual diffusion research strategy of scientists Vailati and Giglio demonstrates that prolonged velocity fluctuations occur quickly during diffusion until the concentration gradient is relaxed. Large spatial fluctuations perpendicular to the gradient are observed. Results indicate that the size of the fluctuations is restricted by gravity.

Chemical reaction, Rate of, Chemical kinetics, Diffusion, Diffusion (Physics)

---

Memories of paste

Article Abstract:

Issues are presented concerning the behavior of pastes which are subjected to stress or loading. The forces acting between the particles within the paste under normal conditions and when stress is applied are discussed.

Condensed matter, Suspensions (Chemistry)

Similar abstracts:

• Abstracts: Patterns of genetic diversity in remaining giant panda populations. Conservation and management of Anacapa island deer mice
• Abstracts: Resveratrol improves health and survival of mice on a high-calorie diet. Adipose-selective targeting of the GLUT4 gene impairs insulin action in muscle and liver
• Abstracts: Male density, female density and inter-sexual conflict in a stream-dwelling insect. Optimal diet theory: when does it work, and when and why does it fail
• Abstracts: Female mating strategy and male brood cannibalism in a sand-dwelling cardinalfish. Male interactions and female mate choice in the sand goby, Pomatoschistus minutus
• Abstracts: What's in a name? Cryptography on the front line. GlaxoSmithKline pushes its labs towards 'biotech' future

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.