sangkuriang-ideal-solver 0.0.3

Idealized Korteweg-de Vries soliton solver with pseudo-spectral methods

sangkuriang: Idealized KdV solver

Idealized Korteweg-de Vries (KdV) soliton solver with pseudo-spectral methods and Numba acceleration.

Physics

Solves the Korteweg-de Vries equation:

$$\frac{\partial u}{\partial t} + \varepsilon \cdot u \cdot \frac{\partial u}{\partial x} + \mu \cdot \frac{\partial^3 u}{\partial x^3} = 0$$

Conservation Laws: Mass, Momentum, Energy

Features

• Spectral (Fourier) spatial derivatives
• DOP853 adaptive 8th-order Runge-Kutta
• Numba JIT compilation (10-100× speedup)
• Multi-core parallel processing
• 3D animated visualizations
• NetCDF4 output

Installation

From PyPI:

pip install sangkuriang-ideal-solver

From source:

git clone https://github.com/sandyherho/sangkuriang-ideal-solver.git
cd sangkuriang-ideal-solver
pip install -e .

Quick Start

Command line:

sangkuriang case1           # Single soliton
sangkuriang case3 --cores 8 # Collision with 8 cores
sangkuriang --all           # Run all cases

Python API:

from sangkuriang_ideal import KdVSolver, SechProfile

solver = KdVSolver(nx=512, x_min=-30.0, x_max=30.0, n_cores=8)
u0 = SechProfile(amplitude=4.0, width=2.0, position=-10.0)(solver.x)
result = solver.solve(u0=u0, mu=0.1, eps=0.2, t_final=50.0)

print(f"Energy error: {result['energy_error']:.2e}")

Test Cases

Case	Description	Physics
1	Single soliton	Baseline
2	Two equal solitons	Phase shift
3	Collision (different heights)	Overtaking
4	Three-soliton system	Complex multi-body

Citation

If you use this software in your research, please cite:

@article{herho202x_sangkuriang,
  title   = {Sangkuriang: An Idealized {K}orteweg-de {V}ries Soliton Solver with Pseudo-spectral Methods},
  author  = {Herho, Sandy H. S. and Irawan, Dasapta E. and Suwarman, Rusmawan and Kaban, Siti N.},
  journal = {xxx},
  volume  = {xxx},
  pages   = {xxx--xxx},
  year    = {202x},
  doi     = {10.xxxx/xxxxx}
}

Authors

• Sandy H.S. Herho
• Dasapta E. Irawan
• Rusmawan Suwarman
• Siti N. Kaban

License

WTFPL - Do What The F*ck You Want To Public License