Why can the sprayer of perfume spray?

Update:22 Jun 2020

In the same fluid, the flow velocity is large and the p […]

In the same fluid, the flow velocity is large and the pressure is small; the flow velocity is small and the pressure is strong. Fluid will flow from high pressure to low pressure.
The nozzle itself has a mechanical structure that allows the liquid to be compressed to generate high pressure. When the liquid passes through the perfume nozzle, the low-speed flowing water is suddenly released after being compressed through the micro-holes of the small nozzle (the principle is similar to the bomb explosion), and there is a relatively high-speed movement between the air, and the water is torn into a small drop due to the high-speed flow. A small drop. These small drops of water became mist after spraying out.
Some friends worry that the perfume will evaporate soon, but it is not necessary.

The design of the spray head of the perfume is actually effective to prevent volatilization, because the contact surface of the liquid in the spray head and the air is very small, most of the spray heads are also designed to block the contact with the air, and the outer cover of the perfume is closed to surround the spray head At the time, the air flow around the nozzle will be lower. In this case, the swing is very low. Only a small part of the small nozzle micropore to the nozzle device will evaporate, so there is no need to worry too much about the perfume passing through the nozzle And the problem of volatilization. Of course, if it's a cologne-like perfume that unscrews the lid and does not close the lid, it will quickly evaporate in the air.