Exploration of CDF methods for incompressible flow. For easiest GPU implementationm, Lattice Boltzman, using BGK in a 2d setting was implemented. The results are visualized as either a heatmap of velocity, or colored by flow direction.
Key Features
Interoperation between Cuda and OpenGl
Exploration of the LBM method and the BGK operation
Tested on lid dirven cavity and flow over a sphere, creating vorticity
Technical Implementation
Starting point is the cuda implementation of LBM
3d grid generation for the 2d LBM solver
Collision, streaming and boundary step, exploring different boundary conditions
Bufferswapping to reduce memory usage
Results & Learnings
High performance due to parallel implementation
Parametertuning, and translation to grid units
Challenges, visualizing the flow of a 2d flow field
Documentation
Direct results of the solver:
Lid driven cavity, with colors indicating flow direction
Flow over a sphere creating the Kármán vortex street