Create and control a phenomenal vortex. Connect two bottles with the device and see this force of nature. Instructions included. A vortex is a spinning, often turbulent, flow of fluid. Any spiral motion with closed streamlines is vortex flow. The motion of the fluid swirling rapidly around a center is called a vortex. The speed and rate of rotation of the fluid are greatest at the center and decrease progressively with distance from the center. When fluid is drawn down a plug-hole, one observes the phenomenon of a free vortex. 1. Use two plastic soda bottles.2. Fill one bottle 2/3 full with water.3. Connect the two bottles with the device.4. Quickly invert so the empty bottle is on the bottom.5. Grasp the top bottle and swirl it in a circular motion.6. Check out the cool vortex that forms!
