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Single collector analysis of collection mechanisms in water filtration
Author(s) -
Rajagopalan R.,
Tien Chi
Publication year - 1977
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450550303
Subject(s) - data collection , trajectory , particle (ecology) , filtration (mathematics) , spheres , surface (topology) , mechanics , particle deposition , work (physics) , computer science , deposition (geology) , simulation , mechanical engineering , physics , engineering , mathematics , aerospace engineering , statistics , geometry , paleontology , turbulence , oceanography , astronomy , sediment , biology , geology
A complete trajectory analysis of particle collection on single spheres, which includes all the known collection mechanisms and forces, is presented here for later experimental verification. The results show that the surface interactions between the collector and the particles have negligible influence on collection rate except to determine whether the surface conditions are favorable or unfavorable for collection. It is also evident that the hydrodynamic retardation of the particle in the neighborhood of the collector can reduce deposition significantly (by 50% or more), but such effects may be negligible in view of the usually wide scatter of filtration data. This paper also provides examples of how the single collector analysis can be directly applied to modelling retention in packed beds. To make the work easily accessible to the readers, all the basic concepts necessary for future application of the trajectory analysis are presented clearly along with a table containing all the relevant forces and torques acting on the particle. An experimental analysis of the results reported here is presented in a subsequent publication.