Wind tunnel simulation of flow around a cylinder (1024×1024 grid)
Wind tunnel simulation of flow around a Airfoil (1024×1024 grid)
This project implements a 2D incompressible, mass-conserving Eulerian fluid simulator using a MAC (Marker-and-Cell) grid. The simulator emphasizes numerical fidelity and performance portability, combining stable advection schemes, pressure projection, and GPU/CPU parallelization.
Key features include:
- Mass-conserving Semi-Lagrangian advection for scalar transport and volume fractions
- Pressure projection via iterative solvers to enforce incompressibility
- Volume-of-Fluid (VOF) advection with overflow redistribution for boundedness
- GPU/CPU parallelization using Kokkos
- Real-time visualization with OpenGL and interactive control via ImGui
- C++ / Kokkos – parallelized simulation kernels
- OpenGL – real-time rendering of the fluid fields
- ImGui – interactive interface for live parameter tuning
- CMake – build configuration
Clone the repository:
git clone git@github.com:tim-pearson/EulerianFluidSim.git
cd EulerianFluidSimClone ImGui (if not already available):
git clone https://github.com/ocornut/imgui.git src/imgui
Build with CMake:
mkdir build
cd build
cmake ..
make -j$(nproc)
Run the simulation:
./sim- MAC grid discretization with staggered velocity, pressure, and volume fraction fields
- Semi-Lagrangian advection for stable transport of scalars and fluids
- Pressure solver (Jacobi iteration) with gradient subtraction for divergence-free velocity fields
- VOF advection with clamping and redistribution to ensure conservation
- Parallelized compute kernels for advection, projection, and pressure solves with Kokkos
- Interactive visualization for debugging and analysis in real time
- Achieves ~14 ms/frame at 1024×1024 resolution (70+ FPS)
- Designed for numerical stability and mass conservation at high resolutions
Wind tunnel simulation Cylinder
Wind tunnel simulation SDL prototype
