Cavitation is the rapid formation of bubble-like droplets when the water molecules in aqueous solution undergo rapid changes in their density. Cavitation occurs when the molecules of aqueous solution vibrate at a frequency that allows their relative motion to change the molecular structure of the water. Cavitation is caused by molecules interacting with a third, fluid-like fluid. In the case of water, this is the surrounding air. When the density of the aqueous solution is changed, molecules move around faster and thus vibrate faster, causing bubbles to form. Find out how this works in a Large Ultrasonic Cleaner. Get Large ultrasonic cleaners from Hilsonic.
When the water molecules vibrate at a certain frequency, they cause vibrations of the nearby molecules, which in turn change the shape of the molecules’ surface, thereby causing the water molecules to vibrate at a new frequency. Cavitation is most common in liquid solutions that contain many molecules. Cavitation occurs when the concentration of molecules is too great for the surrounding water molecules to be able to vibrate with the same frequency. When a mixture of water, oil and gas come into contact, cavitation occurs. This is because oil and water molecules have different atomic structures, so the amount of oil particles that can vibrate will be less than the number of water molecules which can vibrate. This results in the creation of bubbles.
Cavitation can happen in other forms of liquids, such as gas. The presence of gases in water or other liquids makes it possible for the presence of water molecules to interact with the gases in a different manner, allowing them to vibrate at the same frequency. These bubbles are known as eddies.