Sprayer principle

In fact, the water mist droplets. There are four conventional sprayer.
     One kind using Bernoulli's principle. Bernoulli's principle says that in the same liquid, the velocity, small pressure; small flow rate, pressure and powerful. Fluid will automatically flow from the high pressure low pressure. In adopting the trigeminal tube (Figure not drawn specifically, his insight), low-flow water to the high-speed flow of air. Water was torn a small high-speed air a small drop (imagine tap water flowing, the beginning is slow, the water column; but then gradually increasing the speed, it becomes a drop by drop). These droplets erupted since become fog.
     The second use is caused by the pressure into the tubule after high-speed flow, high speed flow encounter obstacles fragmented into small droplets. Situations like the faucet Rolling make big block with finger. Household sprayer and more with this structure and low cost.
     The third is to take charge of water (water is a dielectric), the use of the same charge repel each other into the water droplets. This method is a small particle droplets. The same principle is also used for automotive paint.
     The fourth is the ultrasonic atomization. Vibration can cause the water "spray", the frequency of the ultrasonic vibration is very high, so that the "wave" of the wavelength is small, so it's "spray" - is very small droplets, these droplets become fog. Hospital treatment of respiratory spray jets machine is to use ultrasonic atomization.