Print Email Facebook Twitter Experimental study on orientation and de-mixing phenomena of elongated particles in gas-fluidized beds Title Experimental study on orientation and de-mixing phenomena of elongated particles in gas-fluidized beds Author Boer, L. (Eindhoven University of Technology) Buist, K. A. (Eindhoven University of Technology) Deen, N. G. (Eindhoven University of Technology) Padding, J.T. (TU Delft Intensified Reaction and Separation Systems) Kuipers, J. A.M. (Eindhoven University of Technology) Date 2018 Abstract In this experimental study the segregation behavior for fluidized mixtures of spherical and cylindrical particles is investigated. In industry, fluidization of particles featuring a wide range of shapes is common in various applications such as biomass gasification, drying applications, food processing and production of pharmaceuticals. Earlier publications have mainly focused on segregation of spherical particles of different volume or density. The particles used in this study have equal volume and density but a different shape. The main purpose of this work is to study de-mixing driven by particle shape. To analyze the particle distributions inside the fluidized bed, a Digital Image Analysis (DIA) technique has been developed, capable of capturing the particle positions and orientations within the bed over time. The experiments show that in the non-bubbling flow regime (at low fluidization velocities) rod-shaped particles may segregate, sinking to the bottom of the bed. In the bubbling flow regime (at higher fluidization velocities) segregation does not occur, because of bubble-induced mixing. Here strong alignment of the cylindrical particle's long axis with the flow is observed. The experimental results obtained give qualitative and quantitative insight in the behavior of non-spherical particles in fluidized beds and can be used for validation of numerical models concerning non-spherical particle mixing. Subject FluidizationFluidized bedsGranular dynamicsMixingParticle shapeSegregation To reference this document use: http://resolver.tudelft.nl/uuid:ae03c50e-bd93-46b5-9212-0e307ee2b702 DOI https://doi.org/10.1016/j.powtec.2018.01.083 ISSN 0032-5910 Source Powder Technology, 329, 332-344 Part of collection Institutional Repository Document type journal article Rights © 2018 L. Boer, K. A. Buist, N. G. Deen, J.T. Padding, J. A.M. Kuipers Files PDF 1_s2.0_S0032591018301050_main.pdf 4.72 MB Close viewer /islandora/object/uuid:ae03c50e-bd93-46b5-9212-0e307ee2b702/datastream/OBJ/view