Combustion Toolbox: A MATLAB-GUI based open-source tool for solving gaseous combustion problems

Main features

The Combustion Toolbox is a MATLAB-based thermochemical framework designed to solve problems involving chemical equilibrium for both gas- and condensed-phase species. The toolbox is composed of several modules, each of which is designed to solve a specific class of problems:

• CT-EQUIL computes the equilibrium composition of multi-component gas mixtures undergoing thermochemical transformations. The final equilibrium state is determined by a predefined set of chemical species (gaseous—including ions—or condensed phases) and two thermodynamic state functions, such as enthalpy and pressure, e.g., for isobaric combustion processes.
• CT-SD solves steady-state shock and detonation wave problems for both normal and oblique incidence.
  
• CT-ROCKET estimates the theoretical performance of rocket engines under highly idealized conditions.
• CT-TURBULENCE performs detailed analyses of turbulent flows, including turbulent statistics computations, Helmholtz decomposition, and spectral analyses.

The framework also includes an intuitive graphical user interface (GUI), with a royalty-free standalone version available for Windows, macOS, and Linux.

For installation instructions and usage guidelines, visit the Combustion Toolbox website.

Citing Combustion Toolbox

If you use the Combustion Toolbox in a publication, please cite it using the following references:

• Cuadra, A., Huete, C., & Vera, M. (2024). Combustion Toolbox: An open-source thermochemical code for gas- and condensed-phase problems involving chemical equilibrium. arXiv:2409.15086.
• Cuadra, A., Huete, C., & Vera, M. (2025). Combustion Toolbox: A MATLAB-GUI based open-source tool for solving gaseous combustion problems. Version 1.2.0. Zenodo. doi:10.5281/zenodo.5554911.

It can be handy the BibTeX format:

```bibtex @article{cuadra2024a_preprint, title = {{Combustion Toolbox: An open-source thermochemical code for gas- and condensed-phase problems involving chemical equilibrium}}, author = {Cuadra, A. and Huete, C. and Vera, M.}, journal = {{arXiv preprint arXiv:2409.15086}}, year = {2024}, eprint = {2409.15086}, archivePrefix = {arXiv}, primaryClass = {physics.chem-ph}, doi = {10.48550/arXiv.2409.15086} }

@misc{combustiontoolbox, author = "Cuadra, A. and Huete, C. and Vera, M.", title = "{Combustion Toolbox: A MATLAB-GUI based open-source tool for solving gaseous combustion problems}", year = 2025, note = "Version 1.2.0", doi = {https://doi.org/10.5281/zenodo.5554911} } ```