A CFD-DEM model for aerated vibratory convection was developed to explore the coupled gas-solid interactions governing bulk powder bed dynamics. Each simulation prepared by carefully characterizing rough, porous conveyor baseplate and four candidate particle sizes representative of typical beds. Trends in particles between 20 250 μm diameter could be explained considering each powder's minimum ...

Abstract Freestream turbulence in rivers is a key contributor to the flux of dissolved nutrients, carbon, and other ecologically important solutes into porewater. To advance understanding turbulent hyporheic exchange porewater transport, we investigate flow over through rough bed spheres using large eddy simulation (LES). We apply double averaging (combined space time averaging) LES results det...

In this paper, a large-eddy simulation study of turbulent free surface flow over natural rough bed is presented. A three-dimensional multiphase model employed to the roughness effects on turbulence properties and dynamics. The governing equations have been discretized using finite volume method, with Cartesian cut-cell method being implemented deal precise scanned gravel topography deformable c...

Flow resistance in open channels determines the average flow velocity a river, with important implications for downstream and at-a-station hydraulic geometry sediment transport natural channels. However, steep mountain is challenging to understand predict due heterogeneous channel morphology spatially variable flow. Using double-averaging approach appropriate very rough channels, width, reach, ...

Australia has experienced a sudden and unexpected resurgence in bed bug infestations from both Cimex lectularius L. and Cimex hemipterus F. A survey in 2006 revealed that infestations had increased across the nation by an average of 4,500% since the start of the decade. In response, a multi-disciplinary approach to combat the rise of this public health pest was implemented and involved the coor...