Print Email Facebook Twitter Effect of lift force and hydrodynamic torque on fluidisation of non-spherical particles Title Effect of lift force and hydrodynamic torque on fluidisation of non-spherical particles Author Mema, I. (TU Delft Complex Fluid Processing; TU Delft Intensified Reaction and Separation Systems) Mahajan, V.V. (TU Delft Intensified Reaction and Separation Systems; TU Delft Complex Fluid Processing) Fitzgerald, B. (TU Delft Complex Fluid Processing; TU Delft Intensified Reaction and Separation Systems) Padding, J.T. (TU Delft Complex Fluid Processing; TU Delft Intensified Reaction and Separation Systems) Date 2019 Abstract The aim of many industrial processes is to manipulate solid particle aggregates within gas suspensions. Prime examples of such processes include fluidised bed reactors, cyclone separators, and dust collectors. In recent years, fluidised bed reactors have been used in the gasification of biomass particles. When fluidised, these particles are subject to various hydrodynamic forces such as drag, lift and torque due to interactions with the fluid. Computational approaches, which can be used to replicate laboratory and industrial scale processes, offer a crucial method for the study of reactor design and for the formulation of optimal operating procedures. Until now, many computer models have assumed particles to be spherical whereas, in reality, biomass feedstocks typically consist of non-spherical particles. While lift and torque are of minimal importance for spherical particles, non-spherical particles experience varying lift force and torque conditions, depending on particle orientation relative to the direction of the fluid velocity. In this study, we present a numerical investigation on the effect of different lift force and torque correlations on fluidised spherocylindrical particles. We find that lift force has a significant influence on particle velocities parallel to the direction of gravity. On the other hand, particle orientation is dependent on hydrodynamic torque. Results from this numerical study provide new insight with regards to the dynamics of non-spherical particles that can be of paramount importance for industrial processes involving non-spherical particles. Subject CFD-DEMFluidised bedGas-solid flowHydrodynamic torqueLift forceNon-spherical particles To reference this document use: http://resolver.tudelft.nl/uuid:2a812057-ec5e-4815-9176-bf4f0201aea6 DOI https://doi.org/10.1016/j.ces.2018.10.009 ISSN 0009-2509 Source Chemical Engineering Science, 195, 642-656 Part of collection Institutional Repository Document type journal article Rights © 2019 I. Mema, V.V. Mahajan, B. Fitzgerald, J.T. Padding Files PDF 1_s2.0_S0009250918307140_main.pdf 3.52 MB Close viewer /islandora/object/uuid:2a812057-ec5e-4815-9176-bf4f0201aea6/datastream/OBJ/view