Discrete particle modeling of granular temperature distribution in a bubbling fluidized bed |
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| Authors: | Yurong He Tianyu Wang Niels Deen Martin van Sint Annaland Hans Kuipers Dongsheng Wen |
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| Institution: | 1. Department of Power Engineering, College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands;3. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK |
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| Abstract: | The discrete hard sphere particle model (DPM) is applied in this work to study numerically the distributions of particle and bubble granular temperatures in a bubbling fluidized bed. The dimensions of the bed and other parameters are set to correspond to those of Müller et al. (2008). Various drag models and operational parameters are investigated to find their influence on particle and bubble granular temperatures. Various inlet superficial gas velocities are used in this work to obtain their effect on flow characteristics. It is found that the superficial gas velocity has the most important effect on granular temperatures including bubble granular temperature, particle translational granular temperature and particle rotational granular temperature. The drag force model affects more seriously the large scale variables such as the bubble granular temperature. Restitution coefficient influences all granular temperatures to some degree. Simulation results are compared with experimental results by Müller et al. (2008) showing reasonable agreement. |
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