Effect of magnetic field orientation on fluidized beds of magnetic particles: Theory and experiment |
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| Institution: | 1. Department of Electronics and Electromagnetism, University of Seville, Sevilla, Spain;2. Department of Applied Physics II, University of Seville, Sevilla, Spain;1. Department of Physics, Qufu Normal University, Qufu, 273165, PR China;2. School of Physics and Electronic Engineering, Linyi University, Linyi, 276005, PR China;3. Department of Physics, Dalian University of Technology, Dalian, 116024, PR China;1. Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan and 701, Taiwan;2. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, Taiwan;3. University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan |
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| Abstract: | Geldart-A fluidized beds of fine particles experience a jamming transition between a fluid-like state and a solid-like state at a certain superficial gas velocity, that depends on the relative strength of interparticle attractive forces with respect to particle weight. Interparticle forces provide the bed with a certain tensile strength in the jammed state. In the work presented here we analyze the behavior of a fluidized bed of magnetic particles subjected to an externally applied magnetic field, which contributes to enhance interparticle forces. The importance of the magnetic contribution to interparticle forces is measured by the changes in the tensile strength and the superficial gas velocity at the jamming transition. The link of the field orientation with the microstructure of the bed is discussed. |
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| Keywords: | Magneto-fluidization Jamming transition Fluidization Fine powders Cohesion Magnetization |
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