The above are three spray models. The latter one is fuel injector spray. Consider I have a closed container which I can increase its pressure by any means such by pumping, reduce the volume like with piston, etc, and on the bottom side there is a small opening area a (i.e, a nozzle with diameter 1mm). My question is: How do I quantify the haze-ness/misty-ness or the level of atomization of that spray, including the size of the haze/mist it produced?
Note: The background of my question is that the most atomized the fuel in the combustion chamber the better the combustion, then I searched about fuel injector. But then I realized that I also frequently spray my garden to kill the insects that ruin the plants, and also in many occasions I used spray perfume or deodorant or room fragrant, and so on. There are many applications. In my observation, the spray output are different, more or less their output form are represented by those three pictures.