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shaia edited this page Mar 4, 2026 · 3 revisions

CFD Library

Welcome to the CFD Library wiki! This is a 2D/3D Computational Fluid Dynamics framework implemented in C.

Quick Links

Features

  • 2D/3D structured grids - Uniform and stretched grid generation
  • Multiple solvers - Explicit Euler, Projection Method, RK2 (Heun's method), SIMD, OpenMP, and GPU variants
  • Flexible output - VTK for visualization, CSV for data analysis
  • Pluggable architecture - Easy to add new solvers
  • Cross-platform - Windows, Linux, macOS support

Minimal Example

#include "cfd/api/simulation_api.h"

int main() {
    // Create 100x100 2D simulation on unit square (nz=1 for 2D)
    simulation_data* sim = init_simulation(100, 100, 1, 0.0, 1.0, 0.0, 1.0, 0.0, 0.0);

    // Register VTK output every 10 steps
    simulation_register_output(sim, OUTPUT_VELOCITY_MAGNITUDE, 10, "velocity");

    // Run 100 time steps
    for (int step = 0; step < 100; step++) {
        run_simulation_step(sim);
        simulation_write_outputs(sim, step);
    }

    free_simulation(sim);
    return 0;
}

Available Solvers

Solver Type Best For
explicit_euler CPU Learning, debugging
explicit_euler_optimized CPU+SIMD Large grids on modern CPUs
explicit_euler_omp CPU+OpenMP Multi-core CPU acceleration
projection CPU Accurate pressure-velocity coupling
projection_optimized CPU+SIMD Production simulations
projection_omp CPU+OpenMP Multi-core production simulations
rk2 CPU Second-order temporal accuracy
rk2_optimized CPU+SIMD High-accuracy large grids
rk2_omp CPU+OpenMP High-accuracy multi-core
explicit_euler_gpu GPU Very large grids with NVIDIA GPU
projection_jacobi_gpu GPU High-performance GPU simulations

Documentation

Getting Help

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