Intermittency
The term intermittent (from the Latin intermittent 'to interrupt') describes the characteristic of a nonlinear dynamic system , whose essentially regular behavior is interrupted by rare, brief phases of chaotic behavior. The transition to chaotic behavior occurs through a series of bifurcations .
An indication of intermittency is provided by a probability density distribution that deviates from the Gaussian normal distribution . Intermittency can be found, for example, in turbulent flows .
Intermittenz was first described in 1979 by Yves Pomeau and Paul Manneville (now called Pomeau-Manneville-Intermittenz).
Explanation
"To explain intermittency, it is helpful to know what self-similarity is." An example of self-similarity is the Sierpinski triangle . However , it is not an intermittent behavior because the Sierpinski triangle has a normal distribution , so it is not an intermittent behavior. The break in the normal distribution is one of the conditions for intermittent behavior. The solar wind is often cited as a typical example of intermittent behavior .
See also
Web links
- Mingzhou Ding Intermittency (PDF) ( Memento from March 27, 2004 in the Internet Archive )
Individual evidence
- ↑ Pomeau, Manneville Intermittent transition to turbulence in dissipative dynamical systems , Communications in Mathematical Physics, Volume 74, 1980, pp. 189-197
- ↑ Lars Knapik: Intermittency and structural functions (PDF; 624 kB). Geophysical-Meteorological Seminar, summary of the lecture of July 26, 2008