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On the Mechanisms of Colloidal Particle and Vapor Bubble Aggregation in Liquid Flows
Author(s) -
Bormashenko Edward,
Pogreb Roman
Publication year - 2008
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/ijc.47.3-4.381
Subject(s) - chemistry , capillary action , wetting , colloidal particle , colloid , mechanics , particle (ecology) , flow (mathematics) , bubble , chemical physics , sedimentation , nanotechnology , thermodynamics , physics , paleontology , oceanography , materials science , sediment , biology , geology
Abstract Mechanisms of aggregation of micrometrically scaled colloidal particles and vapor bubbles are discussed. It is shown that when particles move in reference to the liquid, the attractive force induced by the flow may be greater than the capillary interaction. Such a situation is realized when capillary interaction is gravity driven, and particles float. For partial (weak) wetting situations, flow‐induced and capillary attractive forces may be comparable. If the wetting is good, it will play a decisive role in the realistically achievable values of the flow velocities. Hydrody‐namic interaction between particles may be of primary importance for sedimentation and fast dip‐coating‐induced aggregation.