PhasicFlow is a robust, open-source C++ framework designed for the efficient simulation of granular materials using the Discrete Element Method (DEM). Leveraging parallel computing paradigms, PhasicFlow is capable of executing simulations on shared-memory multi-core architectures, including CPUs and NVIDIA GPUs (CUDA-enabled). The core parallelization strategy focuses on loop-level parallelism, enabling significant performance gains on modern hardware. Users can seamlessly transition between serial execution on standard PCs, parallel execution on multi-core CPUs (OpenMP), and accelerated simulations on GPUs. Currently, PhasicFlow supports simulations involving up to 80 million particles on a single desktop workstation. Detailed performance benchmarks are available on the [PhasicFlow Wiki](https://github.com/PhasicFlow/phasicFlow/wiki/Performance-of-phasicFlow).
Ongoing development includes the integration of MPI-based parallelization with dynamic load balancing. This enhancement will extend PhasicFlow's capabilities to distributed memory environments, such as multi-GPU workstations and high-performance computing clusters. Upon completion, PhasicFlow will offer six distinct execution modes:
* **Current Development (v-1.0):** Comprehensive build instructions are available [here](https://github.com/PhasicFlow/phasicFlow/wiki/How-to-build-PhasicFlow%E2%80%90v%E2%80%901.0).
* **Latest Release (v-0.1):** Detailed build instructions are available [here](https://github.com/PhasicFlow/phasicFlow/wiki/How-to-Build-PhasicFlow).
# **Comprehensive Documentation**
In-depth documentation, including code structure, features, and usage guidelines, is accessible via the [online documentation portal](https://phasicflow.github.io/phasicFlow/).
## **Tutorials and Examples**
Practical examples and simulation setups are provided in the [tutorials directory](./tutorials). For detailed explanations and step-by-step guides, please refer to the [tutorial section on the PhasicFlow Wiki](https://github.com/PhasicFlow/phasicFlow/wiki/Tutorials).
# **PhasicFlowPlus: Coupled CFD-DEM Simulations**
PhasicFlowPlus is an extension of PhasicFlow that facilitates the simulation of particle-fluid systems using resolved and unresolved CFD-DEM methods. The repository for PhasicFlowPlus can be found [here](https://github.com/PhasicFlow/PhasicFlowPlus).
If you are using PhasicFlow in your research or industrial work, cite the following [article](https://www.sciencedirect.com/science/article/pii/S0010465523001662):
PhasicFlow relies on the following external libraries:
* **Kokkos:** A performance portability ecosystem developed by National Technology & Engineering Solutions of Sandia, LLC (NTESS). ([https://github.com/kokkos/kokkos](https://github.com/kokkos/kokkos))
* **CLI11 1.8:** A command-line interface parser developed by the University of Cincinnati. ([https://github.com/CLIUtils/CLI11](https://github.com/CLIUtils/CLI11))
