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 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Mean square displacement in small-scale nonlinear dynamos. / Kim, Eun Jin.
In: Physics of Plasmas, Vol. 7, No. 5 , 19.04.2000, p. 1746-1751.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mean square displacement in small-scale nonlinear dynamos
AU - Kim, Eun Jin
PY - 2000/4/19
Y1 - 2000/4/19
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=3042597988&partnerID=8YFLogxK
U2 - 10.1063/1.873994
DO - 10.1063/1.873994
M3 - Article
VL - 7
SP - 1746
EP - 1751
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 5
ER -