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Affleck S, Thomas A, Routh A, Vriend N. Novel protocol for quantifying powder cohesivity through fluidisation tests. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2022.118147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Fu L, Bai H, Bai D, Xu G. Hydrodynamics of gas-solid fluidization at ultra-high temperatures. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Tian F, Liu S, Zhao Z, Lei M. Insight on micro bubbling mechanism in a 2D fluidized bed with Group D particles. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
By CFD-DEM simulations, the present work is aimed to investigate the transient gas-solid bubbling mechanisms along a whole bubble lifecycle in a 2D fluidized bed from a micro perspective. Systemic comparisons with CCD measurements confirm the validity of current simulations. Afterward, the manner of particle motion and its driving mechanisms at various stages are investigated. In order to do that, external forces are analyzed at an individual particle level, including the drag, pressure gradient force, and their resultant acceleration together with gravity. Many interesting findings have been achieved. For example, a switch in directions of drag and pressure gradient forces at the root of an initial bubble enables its detachment. And, regarding their contributions to the burst of a bubble, the drag force is several times of the pressure gradient forces. Present efforts help to offer a novel view of particle dynamics during the bubbling fluidization.
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Affiliation(s)
- Fengguo Tian
- College of Environmental Science and Engineering , Donghua University , 2999 North Renmin Road, Songjiang District , Shanghai 201620 , China
| | - Shulei Liu
- College of Environmental Science and Engineering , Donghua University , 2999 North Renmin Road, Songjiang District , Shanghai 201620 , China
| | - Zifeng Zhao
- College of Environmental Science and Engineering , Donghua University , 2999 North Renmin Road, Songjiang District , Shanghai 201620 , China
| | - Ming Lei
- College of Environmental Science and Engineering , Donghua University , 2999 North Renmin Road, Songjiang District , Shanghai 201620 , China
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