fflused

fflused is a free and open‑source physics engine designed for interactive fluid dynamics simulation in real‑time applications. Developed by the Visual Computing Laboratory at University of X, its first public release appeared in 2018. The library solves the Navier–Stokes equations using a lattice‑Boltzmann approach that is accelerated on GPUs. fflused supports both 2‑D and 3‑D simulations, delivers real‑time pressure mapping, turbulence modeling, and integrates with Unity and Unreal Engine through native plugins. On standard consumer PCs it can sustain over 60 frames per second for 512×512 simulations running on mid‑range graphics cards.

The system has been adopted in academic research on water flow visualization, virtual reality training, and computer‑animated film production. Several conference papers cite fflused as a lightweight alternative to full CFD solvers, notably in SIGGRAPH 2019 and Eurographics 2020 proceedings. The community maintains updates on GitHub, where contributors have added support for anisotropic diffusion, buoyancy effects, and additional boundary condition options.

Technical specifications include a C++ core with CUDA support, C# and Python bindings for high‑level scripting, and an MIT license. Planned future work involves real‑time adaptive mesh refinement and multi‑GPU scaling. The project hosts extensive documentation, tutorials, and a gallery of demo videos to aid developers and researchers.

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