OpenHFDIB-DEM: CFD-DEM coupling

For the 21st OpenFOAM Workshop, held in Guimarães in 2026, we prepared a short course introducing our open-source CFD-DEM framework, OpenHFDIB-DEM. This video concludes the series and presents the complete CFD–DEM workflow using OpenHFDIB-DEM coupled with OpenFOAM. The focus is on bringing together all previously introduced components into a single, consistent simulation pipeline. We demonstrate how solid body definition, movement modes, DEM settings, and fluid-solid coupling interact within a full-scale simulation. The emphasis is placed on the practical setup of a working CFD-DEM case, from preprocessing through execution to basic postprocessing. Topics covered in this video: • Overview of the complete CFD-DEM workflow in OpenHFDIB-DEM • Integration with OpenFOAM solvers • Setup of coupled fluid-solid simulations • Initialization of computational domains with immersed solids • Consistent configuration of DEM and coupling parameters • Execution of a full simulation case • Basic postprocessing workflow and interpretation of results • Practical recommendations for robust CFD-DEM setups The tutorial highlights how individual components presented in earlier videos, that is, solid definition, motion models, DEM contact handling, and numerical settings, combine into a unified simulation framework capable of addressing complex fluid-particle interaction problems. By the end of this video, viewers will be able to set up and run a complete CFD-DEM simulation using OpenHFDIB-DEM and OpenFOAM, and perform initial analysis of coupled multiphase results. OpenHFDIB-DEM repository: https://github.com/techMathGroup/open... Course playlist:    • OpenHFDIB-DEM   Course repository: https://github.com/techMathGroup/open... Laboratory webpage: https://techmathgroup.isoz.eu/ Workshop: 21st OpenFOAM Workshop, Guimarães, Portugal (2026) The course materials are based on the continuously developed open-source framework used in academic research and engineering applications involving fluid–particle interactions, particulate flows, and immersed boundary methods. If you find the course useful, consider starring the repository and subscribing for future updates and related research developments.