Lattice Boltzmann simulation of flow past a non-spherical particle |
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| Authors: | Yanjun Guan Rodrigo Guadarrama-Lara Xiaodong Jia Kai Zhang Dongsheng Wen |
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| Affiliation: | 1. Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China;2. School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK;3. Laboratory of Fundamental Science on Ergonomics and Environmental Control, School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China |
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| Abstract: | Lattice Boltzmann method was used to predict the fluid-particle interaction for arbitrary shaped particles. In order to validate the reliability of the present approach, simulation of flow past a single stationary spherical, cylindrical or cubic particle is conducted in a wide range of Reynolds number (0.1 < Rep < 3000). The results indicate that the drag coefficient is closely related to the particle shape, especially at high Reynolds numbers. The voxel resolution of spherical particle plays a key role in accurately predicting the drag coefficient at high Reynolds numbers. For non-spherical particles, the drag coefficient is more influenced by the particle morphology at moderate or high Reynolds numbers than at low ones. The inclination angle has an important impact on the pressure drag force due to the change of projected area. The simulated drag coefficient agrees well with the experimental data or empirical correlation for both spherical and non-spherical particles. |
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| Keywords: | Lattice Boltzmann method Spherical particle Non-spherical particle Drag coefficient Low-to-high Reynolds number |
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