I was thinking about evaporation from a droplet
there are two ideas
one idea is that a water molecule that comes off the surface of a droplet has a reaction force equal to its own velocity
another idea is that a huge population of molecules has a spread of velocities n that the ones going
fast, near the surface, escape as gas
another idea is that the velocities of the high velocity molecules is the product of sequential push push push from molecuar motions; that idea supports the physics notion of a gas molecule having a reaction force
If molecule of gas do have a reaction force then the angle at which they leave a blob of water affect the rate of evaporation even at identical temperatures
with desalination evaporation is beneficial
so theres a blob of water a molecule of water going straight up as gas has a normal or 90 degree path which completely "conserves" the reaction energy with all of the reaction energy going towards the core of the water blob
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then theres the highly efficient at evaporation narrow angle evaporating molecule at just tanget to the surface
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almost all of its reaction energy is transferred to molecules near the surface so they have an opportunity to be pushed to evaporate at the opposite angle
anyway make a chemical that causes water to have differenently elastic collisions as well as a way of rotating water aerosol droplets to create variations of evaporability even at a given temperature
now then I think this whole thing is upside down water cools as it evaporates with the coolest part near the evaporation layer thats because the droplet carries away more than just the escape velocity energy with it
yet if you think this sufficiently it appears there is an optimal angle of evaporation from a droplet to create cheaper desalination