The vortices in the vortex waveflow have particular moving structure, they develop downstream first, stay at the point for a short time, then move upstream.
涡旋波流场中旋涡有其独特的运动规律——先向下游移动,停留很短的时间后,然后向上游移动。
3
Venant's differential equations. The general analytical solutions of 1st and 2nd approximations have been given for one directional waveflow which propagates into the steady flow region.