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This document outlines the progress made in the simulation of form filling using high-order 2D Taylor-Hood elements and a new 3D free surface tracking algorithm utilizing level sets. It includes verification of the model with benchmarks and lab experiments. Future work will focus on developing a robust numerical model to address pressure oscillations, implementing boundary conditions tailored to specific problems, and exploring formwork/concrete interactions. Challenges such as air escape during casting and reinforcement effects will also be considered, alongside verification and validation of proposed models.
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CTU WP6 – work done so far Simulation of form filling with SCC • Implementation of high-order 2D Taylor-Hood element • Implementation of new 3D free surface tracking algorithm (level sets) • Verification of the model using benchmarks and simple lab-scale experiments
CTU WP6 – future work • Numerical model • Resolve issues with pressure oscillations using XFEM • Implementation of problem-specific boundary conditions • Formwork/concrete interaction, including effects of various coatings and release agents • Formwork air escape • Extension of the model to account reinforcement • Explicit modeling too demanding (complexity of the model) • Anisotropic model based on homogenization is considered. • Verification and validation of the model • Relations between flow pattern and fiber distribution/orientation will be proposed (CTU+DTI)
Simulation Examples – DTI V Funnel Plastic viscosity 39 [Pa.s] Yield stress 38 [Pa]
Simulation Examples - DTI Beam casting Plastic viscosity 39 [Pa.s] Yield stress 38 [Pa]
Note: This simulation reveals some problems we have, particularly modeling air escaping through the formwork – if there is a wall, air cannot escapeand protects concrete to flow inside. In the presented example, some part of top deck has been open, so that some air escaped (as well as some concrete). This affected the results, particularly at later stages of simulation.
