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Characterization of microseparator/classifier with a simple arc microchannel
Author(s) -
Oozeki Nobuo,
Ookawara Shinichi,
Ogawa Kohei,
Löb Patrick,
Hessel Volker
Publication year - 2009
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11650
Subject(s) - microchannel , lift (data mining) , mechanics , classifier (uml) , materials science , computer science , physics , artificial intelligence , data mining
Experimentally characterized is a novel microseparator/classifier, whose functional part is an arc microchannel with a width of 200 μm, depth of 150 μm, and radius of 20 mm. First, a unique separation principle due to shear‐induced lift force is visually demonstrated with neutrally buoyant particles. The device performance is subsequently measured in terms of cut size, separation sharpness, and feed pressure for slightly denser acrylic particles. Compared with representative hydrocyclones, the present device is found to attain significantly smaller cut size at comparable feed pressure, and vice versa. It is finally shown that the device performance remains highest below a critical Stokes number because of no or negligible shear‐induced interparticle collisions. It is concluded that the device is to operate with a high efficiency based on the proposed Stokes number. © 2008 American Institute of Chemical Engineers AIChE J, 2009