Abstract
The stretching property of an underlying fluid is studied in a simplified statistical model of small-scale nonlinear dynamos, via the evolution of the mean square displacement. The nonlinear effect of small-scale magnetic fields is consistently incorporated in the limit of low kinetic Reynolds number. The mean square displacement between two neighboring particles, as well as that of a single particle, is shown to be reduced due to the Lorentz force associated with small-scale magnetic fields. This reduction is suggested to lead to the suppression of stretching of magnetic field lines, and subsequently to the saturation of the growth of small-scale magnetic fields.
| Original language | English |
|---|---|
| Pages (from-to) | 1746-1751 |
| Number of pages | 6 |
| Journal | Physics of Plasmas |
| Volume | 7 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 19 Apr 2000 |
| Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
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Cite this
Kim, E. J. (2000). Mean square displacement in small-scale nonlinear dynamos. Physics of Plasmas, 7(5 ), 1746-1751. https://doi.org/10.1063/1.873994