Forces and grain-grain contacts in bidisperse beds sheared by viscous fluids I: Pre-CFDEM Scripts

These files include both pre-setup and post-setup CFDEM simulations at the grain scale, using Computational Fluid Dynamics-Discrete Element Method (CFD-DEM). With this approach, we tracked the positions, velocities, forces, and solid contacts experienced by each grain, enabling us to analyze the distribution of forces caused either directly by the fluid or through solid-solid contacts within the bed. We also explored the relationship between force propagation and the reorganization of grains in beds sheared by viscous flow. Additionally, we provide MATLAB scripts to: i) extract data from CFDEM results files, ii) reorganize bed properties and contact force data by time and by particle, and iii) compute variables and generate plots.