English to French Science Science (general) weather control

-"Water droplets with a radius of higher than 25 microns have sufficient mass to attain a fall velocity under the force of gravity sufficient to collect smaller droplets and precipitate from clouds or fog owing to their collisions and coalescence".
-"The drop moving under the force of gravity may collect the small droplets locating within a cylinder"
-"Collisions between the droplets are possible only due to droplet inertia that leads to a deviation of the collected droplets from streamlines of the airflow"
-"It can be appreciated that when the drop collectors have a small radius, i.e. around 10 microns, the value of the collision efficiency is very small (ranging from 10-4 to 10-2)"

N'étant pas familier avec ces termes, je ne sais pas quel est le bon terme à employer en français pour COLLECT ? Merci.