Chains of atoms move at lightning speed inside metals

A phenomenon that has previously been seen when researchers simulate the properties of planet cores at extreme pressures has now also been observed in pure titanium at atmospheric pressure. Chains of atoms dash around at ...

Modeling airborne disease diffusion

With outbreaks of airborne diseases such as measles occurring with growing frequency, modeling how the diffusion process works in dynamic contact networks is an increasingly important research area for epidemiology. A team ...

Galaxy found to float in a tranquil sea of halo gas

Using one cosmic mystery to probe another, astronomers have analyzed the signal from a fast radio burst, an enigmatic blast of cosmic radio waves lasting less than a millisecond, to characterize the diffuse gas in the halo ...

Entropy explains RNA diffusion rates in cells

Recent studies have revealed that within cells of both yeast and bacteria, the rates of diffusion of RNA proteins—complex molecules that convey important information throughout the cell—are distributed in characteristic ...

A new material for the battery of the future

Renewable sources of energy such as wind or photovoltaic are intermittent; production peaks do not necessarily follow the demand peaks. Storing green energy is therefore essential to moving away from fossil fuels. The energy ...

page 1 from 14

Diffusion

Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration. The time dependence of the statistical distribution in space is given by the diffusion equation. The concept of diffusion is tied to that of mass transfer driven by a concentration gradient. Diffusion is invoked in the social sciences to describe the spread of ideas.

This text uses material from Wikipedia, licensed under CC BY-SA