Abstract
The free motion of a sphere in a fluid with solid body rotation is considered. The equations of motion of the sphere are formulated and a theoretical model for the surface force is introduced. From theory it follows that after commencement of the motion the horizontal part of the trajectory of the sphere is a logarithmic spiral. This result is verified by experiment. It was also found experimentally that the drag of the sphere is considerably higher than that of a sphere moving in a non-rotating fluid. The flow around the sphere is asymmetrical thus producing a dynamic lift during the motion. This points to the existence of a Taylor-column moving with the sphere. The results make it possible to compute not only the forces acting on the surface but also the trajectory of the sphere.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call