https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:29009 50< 100 µm) remain poorly understood. To improve the understanding of aerated fine powder rheological behaviours, this research has focussed on experimentally determining rheological properties using a modified rotary viscometer. The modified device comprises a fluidisation vessel and a common rotary viscometer (based on circular Couette flow). Flyash powder was selected as testing material. Experimental results indicate that the aerated Flyash can be characterised as a Yield Power-law fluid or a Power-law fluid, depending on the aeration level. Consequently, this research provides a significant increase in the understanding of rheological behaviours within fine air-powder mixtures.]]> Wed 11 Apr 2018 16:19:41 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:24168 Wed 11 Apr 2018 15:50:16 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:8955 Sat 24 Mar 2018 08:37:11 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:30135 Sat 24 Mar 2018 07:39:12 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:22858 50 <100 μm) behave analogously to liquids when aerated by air. Hence, methods (e.g. Couette method) used to determine the flow performance of liquids can be adopted to investigate the similar flow properties (e.g. apparent shear resistance) of aerated powders. By this means, the understanding and handling techniques for aerated fine powders can be significantly enhanced. This research aims to investigate the apparent shear resistance of aerated fine powders through a specialised viscometer. Such a viscometer is combined with a fluidisation system and a common rotary viscometer. Three types of fine powders (alumina, cement and flyash) were selected as testing materials. Experimental results indicated that aerated fine powders behave similarly to Herschel–Bulkley non-Newtonian fluids. Subsequently, the apparent shear resistance for three fine powders were modelled by modifying the original Herschel–Bulkley rheology model. Consequently, the apparent shear resistance of a specific aerated powder can be measured and modelled using the bench scale system developed in this study, thus can be utilised to predict the flow performance of fine powders in pneumatic conveyors.]]> Sat 24 Mar 2018 07:16:02 AEDT ]]>