Determination of non-spherical particle terminal velocity using particulate expansion data |
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| Affiliation: | 1. Institute for Technology and Metallurgy, University of Belgrade, Belgrade, Yugoslavia;2. Faculty of Technology and Metallurgy, University of Belgrade, Department of Chemical Engineering, Karnegijeva 4, POB 3503, 11120 Belgrade, Yugoslavia;1. ICTM-Center for Chemistry, University of Belgrade, Njego?eva 12, 11000 Belgrade, Serbia;2. Faculty of Chemistry University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia;1. Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, PO Box 5048, 2600 GA Delft, The Netherlands;2. College of Civil Engineering and Architecture, Beijing University of Technology, Pingleyuan 100, 100124 Beijing, China;1. Research Center for Functional Materials and Nanomolecular Science, Electronic Devices and Nanophotonics Laboratory, Jacobs University Bremen, Bremen, Germany;2. Department of Physical Electronics, Tokyo Institute of Technology, Tokyo, Japan;3. Photovoltaics Research Center (PVREC), Tokyo Institute of Technology, Tokyo, Japan;1. Serbian Academy of Sciences and Arts (SASA), Knez Mihailova 35, Belgrade 11000, Serbia;2. Institute of Tecnical Sciences of SASA, Knez Mihailova 35, Belgrade 11000, Serbia;3. ICTM-Center of Microelectronic Technologies, University of Belgrade, Njego?eva 12, Belgrade 11000, Serbia |
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| Abstract: | A new method is proposed for the determination of the terminal velocity of non-spherical particles and compared with experimental data. The method is based on particulate expansion data of fluidized bed and variational model for calculating fluid–particle interphase drag coefficient. Other methods require knowledge of the particle shape, a parameter that is not easy to obtain for real materials. We use pressure drops data in packed bed for indirect determination of particle shape factor which depends on the reliability of coefficients in the Ergun equation. Our data, however, show that these coefficients are system-specific. The proposed method for the determination of non-spherical particle settling velocity in liquid as well as extrapolation to system gas-particles gives results which are in good agreement with experimental data. The method is restricted to particles which can be fluidized particulately by liquid. |
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