Volk R, Ravelet F, Monchaux R, Berhanu M, Chiffaudel A, Daviaud F, Odier Ph, Pinton J-F, Fauve S, Mordant N, Pétrélis F
Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, CNRS UMR 5672, 47 allée d'Italie, 69364 Lyon Cedex 07, France.
Phys Rev Lett. 2006 Aug 18;97(7):074501. doi: 10.1103/PhysRevLett.97.074501. Epub 2006 Aug 17.
We study the effect of a turbulent flow of liquid sodium generated in the von Kármán geometry, on the localized field of a magnet placed close to the frontier of the flow. We observe that the field can be transported by the flow on distances larger than its integral length scale. In the most turbulent configurations, the mean value of the field advected at large distance vanishes. However, the rms value of the fluctuations increases linearly with the magnetic Reynolds number. The advected field is strongly intermittent.
我们研究了在冯·卡门几何形状中产生的液态钠湍流对置于靠近流边界处的磁体局部场的影响。我们观察到，该场可以被流体输送到大于其积分长度尺度的距离。在最湍流的配置中，在大距离处平流的场的平均值消失。然而，涨落的均方根值随磁雷诺数线性增加。平流场具有强烈的间歇性。
