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

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 thermochemical equilibrium composition of multi-component gas mixtures for prescribed set of chemical species (gaseous—including ions—or condensed phases) and thermodynamic constraints (e.g. pressure-enthalpy). 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-LIA predicts shock-turbulence interaction statistics using linear theory, accounting for thermochemical effects. CT-TURBULENCE performs spectral and statistical analysis of turbulent flows, including energy spectra, Helmholtz decomposition, and turbulence diagnostics. 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. (2026). Combustion Toolbox: An open-source thermochemical code for gas-and condensed-phase problems involving chemical equilibrium. Computer Physics Communications 320, 110004. doi:10.1016/j.cpc.2025.110004. Cuadra, A., Huete, C., & Vera, M. (2026). Combustion Toolbox: A MATLAB-GUI based open-source tool for solving gaseous combustion problems. Version 1.2.8. Zenodo. doi:10.5281/zenodo.5554911. It can be handy the BibTeX format: @article{cuadra2026a, title = {{Combustion Toolbox: An open-source thermochemical code for gas- and condensed-phase problems involving chemical equilibrium}}, author = {A. Cuadra and C. Huete and M. Vera}, journal = {Computer Physics Communications}, volume = {320}, pages = {110004}, year = {2026}, issn = {0010-4655}, doi = {https://doi.org/10.1016/j.cpc.2025.110004},} @misc{combustiontoolbox, title = "{{Combustion Toolbox: A MATLAB-GUI based open-source tool for solving gaseous combustion problems}}", author = {A. Cuadra and C. Huete and M. Vera}, year = {2026}, note = {Version 1.2.8}, doi = {https://doi.org/10.5281/zenodo.5554911}}