- Volumes 84-95 (2024)
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Volumes 72-83 (2023)
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Volume 83
Pages 1-258 (December 2023)
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Volume 82
Pages 1-204 (November 2023)
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Volume 81
Pages 1-188 (October 2023)
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Volume 80
Pages 1-202 (September 2023)
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Volume 79
Pages 1-172 (August 2023)
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Volume 78
Pages 1-146 (July 2023)
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Volume 77
Pages 1-152 (June 2023)
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Volume 76
Pages 1-176 (May 2023)
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Volume 75
Pages 1-228 (April 2023)
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Volume 74
Pages 1-200 (March 2023)
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Volume 73
Pages 1-138 (February 2023)
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Volume 72
Pages 1-144 (January 2023)
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Volume 83
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Volumes 60-71 (2022)
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Volume 71
Pages 1-108 (December 2022)
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Volume 70
Pages 1-106 (November 2022)
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Volume 69
Pages 1-122 (October 2022)
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Volume 68
Pages 1-124 (September 2022)
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Volume 67
Pages 1-102 (August 2022)
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Volume 66
Pages 1-112 (July 2022)
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Volume 65
Pages 1-138 (June 2022)
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Volume 64
Pages 1-186 (May 2022)
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Volume 63
Pages 1-124 (April 2022)
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Volume 62
Pages 1-104 (March 2022)
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Volume 61
Pages 1-120 (February 2022)
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Volume 60
Pages 1-124 (January 2022)
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Volume 71
- Volumes 54-59 (2021)
- Volumes 48-53 (2020)
- Volumes 42-47 (2019)
- Volumes 36-41 (2018)
- Volumes 30-35 (2017)
- Volumes 24-29 (2016)
- Volumes 18-23 (2015)
- Volumes 12-17 (2014)
- Volume 11 (2013)
- Volume 10 (2012)
- Volume 9 (2011)
- Volume 8 (2010)
- Volume 7 (2009)
- Volume 6 (2008)
- Volume 5 (2007)
- Volume 4 (2006)
- Volume 3 (2005)
- Volume 2 (2004)
- Volume 1 (2003)
• Circular, square, and rectangular risers were studied at two different bed heights.
• A single bubble appeared in circular and square risers.
• Double bubbles existed in the rectangular riser.
• A single-core annulus structure appeared in circular and square risers.
• A double-core annulus structure emerged on the long side of the rectangular riser.
The performance of a circulating fluidized bed strongly depends on its parameter settings, including that of riser geometry. In this study, a laboratory-scale circulating fluidized bed with three different riser geometries (circular, square, and rectangular) that had the same cross-sectional area and height was operated under two static bed heights (20, and 35 cm). Electrical capacitance tomography was combined with differential pressure transducers and an optical-fiber probe to measure the solids’ volume fraction, differential pressure fluctuations, and radial particle concentration variations. Computational particle fluid dynamics simulations were also performed. The results showed that single bubbles appeared in the bottom region of the circular and square risers and double bubbles in the bottom region of the rectangular riser. The autocorrelation of capacitance signals was periodic for the circular and square risers and non-periodic for the rectangular riser. The radial particle concentration profiles showed a single-core annulus structure in the circular and square risers, but a double-core annulus structure along the long side and single-core annulus structure along the short side in the rectangular riser. Shannon entropy analysis showed that fluidization was less disordered and most predictable for the rectangular riser.