A CFD-DEM Approach to Model the Behavior of Fibers in Fresh UHPC скачать в хорошем качестве

A CFD-DEM Approach to Model the Behavior of Fibers in Fresh UHPC

Presented By: Patricio Moreno-Casas, Universidad De Los Andes The alignment and uniform distribution of steel fibers within ultra-high-performance concrete (UHPC) are essential for optimizing its structural performance. These factors are determined during the casting phase when the concrete is still in its fluid state. To comprehensively analyze how variables such as fresh UHPC rheology, fiber type, reinforcing bars, and casting equipment influence fiber orientation and distribution, a robust predictive tool is required. This tool should be capable of simulating the microscale interactions between the fluid mortar and the embedded fibers. To this end, we will employ a synergistic approach that integrates Computational Fluid Dynamics (CFD) with Discrete Element Methods (DEM), a combination proven effective in elucidating complex multiphase flows. The accuracy of the CFD model will be initially confirmed through comparisons with controlled laboratory experiments. Subsequently, advanced imaging techniques will be employed to register the fiber movements, providing a basis for comparing and validating the DEM predictions. The findings from this comprehensive evaluation will constitute the main focus of the forthcoming presentation.