论文标题
自由表面磁流体动力波湍流的三维直接数值模拟
Three-dimensional direct numerical simulation of free-surface magnetohydrodynamic wave turbulence
论文作者
论文摘要
我们报告了经受外部水平磁场的磁液的自由表面上波湍流的三维直接数值模拟。对于增加的场，观察到从毛细管波湍流到各向异性磁毛细管波湍流的过渡。在足够高的场上，波湍流变为高度各向异性，主要垂直于田间方向，与现象学模型的预测和各向异性ALFV {é} N波湍流非常吻合。尽管磁性流体上的表面波与血浆中的Alfv {é} n波不同，但发现具有相似波光谱尺度和相似磁场依赖性分散波速度的强类比。
We report on three-dimensional direct numerical simulation of wave turbulence on the free surface of a magnetic fluid subjected to an external horizontal magnetic field. A transition from capillarywave turbulence to anisotropic magneto-capillary wave turbulence is observed for an increasing field. At high enough field, wave turbulence becomes highly anisotropic, cascading mainly perpendicularly to the field direction, in good agreement with the prediction of a phenomenological model, and with anisotropic Alfv{é}n wave turbulence. Although surface waves on a magnetic fluid are different from Alfv{é}n waves in plasma, a strong analogy is found with similar wave spectrum scalings and similar magnetic-field dependent dispersionless wave velocities.
