VOF-DEM Solvers
This repository provides implementations of coupled Volume of Fluid (VOF) and Discrete Element Method (DEM) solvers for simulating multiphase flows with unresolved CFD-DEM methodology, where fluid cells are larger than individual particles. The solvers are developed within the CFDEMproject framework and are suitable for advanced micromechanical modeling of fluid-particle systems.
Overview
- cfdem_interDyMFoam: Solver using the PISO algorithm for transient incompressible flow with CFD-DEM coupling.
- cfdem_interDyMFoamPIMPLE_5x: Solver using the PIMPLE algorithm for enhanced stability and flexibility in time-stepping.
Both solvers integrate VOF for interface capturing and DEM for particle dynamics, enabling detailed studies of fluid-particle interactions in unresolved regimes.
Key Features
- Unresolved CFD-DEM Coupling: Fluid mesh is coarser than particle scale, allowing efficient simulation of large systems.
- VOF Interface Tracking: Accurate modeling of multiphase interfaces.
- Flexible Turbulence Modeling: Supports laminar, RAS, and LES turbulence models.
- Micromechanical Analysis: Designed for single-cycle and transient simulations, including injection and displacement scenarios.
- Validation and Benchmarking: Includes comparison with experimental data for injection pressure evolution.
Publications
For detailed methodology and validation, see:
Phys. Rev. E 102, 013301 (2020)
Repository Structure
cfdem_interDyMFoam/
PISO-based solver source code and configuration files.cfdem_interDyMFoamPIMPLE_5x/
PIMPLE-based solver source code and configuration files.figures/
Reference figures.README.md
Project documentation.Paper.pdf
Reference publication.
Example Workflow
1. Setup
The computational domain consists of solid particles and an unresolved CFD mesh.
FIG. 2: Domain setup and volume fraction snapshots for injected fluid.
2. Simulation
- Configure case files and parameters as per your scenario.
- Run the solver (
cfdem_interDyMFoam or cfdem_interDyMFoamPIMPLE_5x) using OpenFOAM utilities.
- Analyze results for volume fraction, void fraction, particle positions, and injection pressure.
3. Validation
Comparison with experimental data is provided for injection pressure evolution:
FIG. 3: Experimental vs. computational results for injection pressure.
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