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Dense gas-particle flow in vertical channel by multi-lattice trajectory model

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Abstract

A multi-lattice deterministic trajectory (MLDT) model is developed to simulate dense gas-particle flow in a vertical channel. The actual inter-particle collision and particle motion are treated by a Lagrangian model with three sets of lattices to reduce computational time. Cluster formation and motion near the wall are successfully predicted with mean particle volume fraction and velocity, showing quantitatively agreement with experimental results. The mechanism of particles concentrated near the wall is investigated by considering effects of gravity, particle-wall collisions, inter-particle collisions and velocity profiles of the gas phase. It is shown that the inter-particle collision and gas-phase velocity distribution are the essential factors for cluster formation near the wall, while gravity and particle-wall collision only have minor effects on particle concentration near the wall. Particles are unable to remain in the high velocity region due to the strong inter-particle collisions, while they tend to stay in the low velocity region for weak inter-particle collisions. In addition, the effects of channel width and particle sizes on cluster formation are also investigated and it is found that particle concentration near the wall reduces with the decrease of channel width and increase of particle size.

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Authors and Affiliations

  1. School of Aerospace, Tsinghua University, Beijing, 100084, China

    HuiQiang Zhang, Min Liu, Bing Wang & XiLin Wang

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  1. HuiQiang Zhang
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  2. Min Liu
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  3. Bing Wang
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  4. XiLin Wang
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Correspondence to Bing Wang.

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Zhang, H., Liu, M., Wang, B. et al. Dense gas-particle flow in vertical channel by multi-lattice trajectory model. Sci. China Technol. Sci. 55, 542–554 (2012). https://doi.org/10.1007/s11431-011-4578-7

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  • DOI: https://doi.org/10.1007/s11431-011-4578-7

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