Evolution of multicomponent particles undergoing simultaneous evaporation/growth and fragmentation Academic Article uri icon

abstract

  • The effect of simultaneous evaporation/condensation and fragmentation on relatively large particles is analyzed in an analytical-numerical way. Multicomponent particles are considered in the model, where each species has a different rate of evaporation/condensation. A suitable example which is considered is large sea salt particles, with a low number concentration. They are assumed to be subjected to shear stress exerted by wind in the boundary layer near sea surface, tending to breaking them into fragments. For focusing on the effect of such a fragmentation process, a relatively simple form of evaporation- condensation law is employed. It is concluded that production of small particles by the fragmentation mechanism can be partially responsible for the wide size range of sea salt particles found near ocean surface. Also, as large sea salt particles are numbered but comprise most of marine aerosol mass and on the other hand have a short residence time, it is important to take fragmentation into account, especially when analyzing the atmospheric cycle of elements they are comprised of.

publication date

  • January 1, 1999