What is vortex motion

Question

anonymous · Answer

The motion of the fluid swirling rapidly around a center is called a vortex.  To see the vortex motion, just plug the outflow hole in the wash basin and let it fill with water.  Now pull the plug and let the water flow out.  You will see a vortex forming right in front of your eyes.

The speed and rate of rotation of the fluid in a free (irrotational) vortex are greatest at the center, and decrease progressively with distance from the center, whereas the speed of a forced (rotational) vortex is zero at the center and increases proportional to the distance from the center. Both types of vortices exhibit a pressure minimum at the center, though the pressure minimum in a free vortex is much lower.

anonymous · Answer

A mass of whirling fluid or air, esp. a whirlpool or whirlwind.

anonymous · Answer

pressure minimum in a free vortex is much lower!