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Flow‐Induced Coalescence in Polydisperse Systems
Author(s) -
Fortelný Ivan,
Jůza Josef
Publication year - 2014
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201400050
Subject(s) - coalescence (physics) , breakup , materials science , radius , mechanics , fusion , distribution function , range (aeronautics) , thermodynamics , physics , composite material , linguistics , philosophy , computer security , astrobiology , computer science
The theory of flow‐induced coalescence, based on the switch between the rates of approach of spherical and flattened droplets, is generalized to systems with different droplet radii. Probability, P c , that the droplet collision will be followed by their fusion is calculated for systems containing droplets with two different droplet radii as a function of the average droplet radius. Analysis of the results obtained shows that P c is a gradually decreasing function of the average droplet radius, 〈 R 〉 in broad range of 〈 R 〉 for systems with a large width of droplet radii distribution. The dependence of P c for a polydisperse system should be considered also if experimentally determined average particle size is regarded as a result of the competition of the droplet breakup and coalescence in flowing polymer blends.