论文标题
湍流/非扰动界面处的能量级联
The energy cascade at the turbulent/non-turbulent interface
论文作者
论文摘要
在湍流/非扰动界面附近的尺度能量转移是从小尺度到大尺度的，靠近界面切线平面的方向，主要是拉伸运动，但在其他方向上的大小到小尺度，其中运动主要是压缩的，并且与方形角动力学显着相关。极端压缩运动在这一占主导地位的重要作用，即使在平均伸展运动的情况下，即使运动的可能性也可能比极端拉伸运动。当界面尽可能与Wake Centreline尽可能远时，发生最激烈的尺度转移率和耗散。
Interscale energy transfers at the vicinity of the turbulent/non-turbulent interface are from small to large scales in directions close to the interface's tangent plane where motions are predominantly stretching, but from large to small scales in the other directions where motions are predominantly compressive and significantly correlated with square angular momentum. An important role in this predominance is played by the extreme compressive motions which can be significantly more likely than extreme stretching motions even where motions are on average stretching. The most intense interscale transfer rates and dissipation occur when the interface is as far as possible from the wake centreline.
