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Politics : Peak Oil reality or Myth, of an out of Control System
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To: dvdw© who wrote (316)3/7/2011 3:52:55 PM
From: dvdw©Read Replies (1) of 1580
 
NucleationNucleation is the process of forming particles from a purely gaseous precursor phase.

There are two types of nucleation processes,

1.homogenous nucleation
2.heterogeneous nucleation.
Nucleation occurs for different reasons. Important among them, is the supersaturation of a vapor. When a hot vapor in a gas is cooled down, its supersaturation ratio increases, and it becomes supersaturated. Therefore, it "precipitates out" into particles. This process is called nucleation.

[edit] CoagulationWhen particles are present in an aerosol they collide with each other. During that they may undergo coalescence or aggregation. This process leads to a change in the aerosol size distribution function.

[edit] Surface GrowthSurface growth is the process by which an aerosol particle grows with the accretion of monomers or individual molecules to an already existent particle.
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