And, if you take a vector field where maybe everything is rotating, a flow that's just rotating about some axis, then you'll find that its divergence is zero.
如果取一个有旋的向量场，流体流动方向是环绕某个坐标轴的，那么就会发现它的散度是零。
2
The variation and transmit of the radial and tangential energy flow in the air gap of electrical machines are illustrated by analyzing the divergence of Poynting vector.
通过对坡印亭矢量的散度的分析，阐明了电机气隙中径向能流和切向能流的变化和传递。
3
The problem of power flow equation divergence can be overcomed by continuation power flow method.