The University of Osaka · Engineering
Professor Takuya Tsuji's research lab specializes in multiphase flows and granular dynamics, focusing on the numerical and experimental analysis of complex fluid-solid interactions. The lab investigates dense gas–solid flows, turbulent natural convection, and the mechanics of granular materials under various boundary conditions using advanced simulation techniques such as the discrete element method (DEM) and computational fluid dynamics (CFD). Key research directions include the development of hybrid numerical models for multi-scale particle systems, the dynamics of drag forces in granular media, and the characterization of turbulent boundary layer structures in natural convection. The lab combines computational modeling with experimental validation to address fundamental challenges in industrial and environmental applications such as fluidized beds, pneumatic conveying, and heat transfer in complex flows.
Figures are computed from collected data and may differ slightly.
Large solids coexist with small solids in a number of dense gas‐solid flow applications such as fluidized beds and pneumatic conveyers. A new numerical model that is based on the discrete element method–computational fluid dynamics mesoscopic model and extended by introducing an idea appearing in volume penalization method is presented. In computational cells including large and small solids, the amount of momentum exchange between the fluid and the solids is estimated by assuming that a large s
The interaction between dry granular materials and an inclined plate is numerically studied using a three-dimensional discrete element method (DEM) simulation. In the simulation, a plate is dragged horizontally through densely packed dry granular materials. To examine the effect of the rake angle α of the plate on the drag force acting on the plate, three cases with α = 50°, 70°, and 90° are compared (α = 90° for a vertical plate). The results show that for all cases, the force oscillates as the
The spatio-temporal structures of a turbulent natural convection boundary layer along a vertical flat plate in air have been examined using a thermocouple rake and a pair of hot-wire/cold-wire arrangements. The instantaneous temperature profile clearly indicates the evolution of a large-scale motion originating in the outer region of the boundary layer. However, the space-time correlation measurements did not suggest the existence of any quasi-coherent structures such as low-speed streaks and bu
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