Abstract
The nucleation on liquid surfaces may be considered as a general case of heterogeneous phase transformation. In the present paper two special cases of nucleation on a curved liquid surface are studied theoretically. 1) Nucleation from the vapour phase on foreign drops. Crystallization of small liquid droplets if the wetting of the nuclei by the melt is incomplete. In the first case it results that foreign liquid particles are more efficient in stimulating the nucleation, than solid ones (by equal adhesion energy). The influence of droplet size on the crystallization shows some particularities, e.g. the possibility of formation of crystal nuclei above the melting point and the existence of a droplet size effect also for crystallization without volume change.
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