流体运动中有旋无旋的判定

The Determination of the Rotation and Rotationless in the Fluid Novement

本文依照刚体速度分解定理的形式，以剪切流动为例推得流体的速度分解定理，总结出流体流动的有旋与无旋的判定公式，并用实例加以验证。

In compliance with the formation of the decomposition theorom of the rigid body speed, in this paper the decomposition theorom of the fluid speed has been got based on the example of cutting flowing.We have summarized the determining formular of the rotation and rotationless of fluid flowing, which is tested and verified by examples,Finally ,we have summarized the difference of the decomposition theorom of rotation, rotationless and speed of the rigid body movment and fluid movement.