A C++ real time fluid simulation engine based on the incompressible Navier-Stokes equation. This implementation is a hybrid method using particles for advection and a grid for solving the incompressible equations. All computing is done on the GPU with Vulkan using compute shaders.

Documentation can be found at https://vortex2d.readthedocs.io.

Various scenes can be selected in the example application with the number keys 1 till 8.

Get the LunarG Vulkan SDK, and extract somewhere. Vortex2D requires the glslangValidator compiler which is installed with the SDK. Some env vars need to be set so cmake can find the SDK: source setup-env.sh.

Vortex2D can then be built with cmake as so:

mkdir build && cd build
cmake .. -DVORTEX2D_ENABLE_EXAMPLES=On -DVORTEX2D_ENABLE_TESTS=On
make -j 4

Get the lunarG Vulkan SDK and install. That's it, you can then build Vortex2D with cmake. Start the cmake-gui, select the source and build folder and configure. Select VORTEX2D_ENABLE_EXAMPLES to also build the examples.

Get the LunarG Vulkan SDK or build MoltenVK directly. Vortex2D requires the glslangValidator compiler which is installed with the SDK.

Vortex2D can then be built with cmake as so:

mkdir build && cd build
cmake .. -DVORTEX2D_ENABLE_EXAMPLES=On -DVORTEX2D_ENABLE_TESTS=On -DMOLTENVK_DIR=path_to_sdk/MoltenVK -DGLSL_VALIDATOR=path_to_bin/glslangValidator
make -j 4

• 3rd order runge kutta interpolation
• Bicubic interpolation
• Multi grid preconditioned conjugate gradient linear solver
• FLIP & PIC hybrid method
• Strong rigid body coupling
• Level set re-initialisation