https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20579 Sat 24 Mar 2018 07:55:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21352 th chemical looping combustion system. The particles motion was modelled by discrete element model (DEM) whilst the gas flow field was solved using the computational fluid dynamics (CFD) method. A two-way coupling algorithm was applied to take into account gas-particle interactions. The influence of boundary conditions and the sensitivity of domain size were tested. The model was then used to examine effects of the superficial gas velocity on the mixing/segregation behaviour of particles in terms of mixing index. The results showed that small domain sizes (i.e. with the width of the 2D domain size being a quarter of the fluidized bed diameter) can be used effectively in combination with the periodic boundary conditions to capture the overall mixing and segregation behaviour of binary system of particles in a large scale fluidized bed system. Also it was demonstrated that the domain size has minor influence on simulation results when using periodic boundary conditions. Moreover increasing the size of polyethylene particles in the binary mixture was found to decrease the mixing index resulting in poor mixing. Finally simulation results were compared with the experimental data under bubbling fluidized bed conditions. A reasonable agreement between the experimental data and the model predictions of the mixing index was obtained.]]> Sat 24 Mar 2018 07:51:27 AEDT ]]>