Reginaldo Gonçalves Leão Junior, Ph.D.

Thermochemistry · Combustion · Radiation Transport
Professor, Instituto Federal de Minas Gerais (IFMG) · Brazil

_{English · Português}

"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them."

— William Lawrence Bragg

Computational scientist working on thermochemistry, combustion and radiation transport. Ph.D. in Radiation Science (UFMG), with degrees in Physics and Chemical Engineering. Maintainer of open-source scientific software.

Professor at the Instituto Federal de Minas Gerais (IFMG), Brazil, where I work on energy systems.

Member of GESESC (Study Group on Energy Systems and Computational Simulation), certified in the CNPq research group directory.

• NASA-polynomial thermochemistry and combustion modeling
• Monte Carlo radiation transport (EGSnrc / BEAMnrc / DOSXYZnrc)
• Numerical methods applied to energy systems
• Heat transfer and fluid dynamics in complex systems
• Computational modeling of nuclear reactors

🔗 GESESC group at CNPq

• Physics
• Applied Programming for Engineering
• Energy Resources
• Introduction to Nuclear Engineering
• Numerical Analysis
• Thermodynamics

Open-source packages for thermochemical modeling in engineering — a single NASA-polynomial core, exposed to two ecosystems.

Package	Version	Reach	Stars	DOI
pyglenn Python · PyPI — thermodynamic properties from NASA polynomial coefficients, SQLite-backed
Glenn.jl Julia · General — NASA Glenn coefficients for thermodynamic properties of individual species				—
pyglenn-notebooks Jupyter — notebooks exploring thermochemical data with pyglenn	—	—		—

_{Metrics are refreshed automatically: PyPI downloads from pypistats (last 30 days, mirrors included); Julia reach from the official package-server telemetry, aggregated over the window Julia publishes (julialang-logs/public_outputs/current) — no all-time figure is released.}

Validation — Glenn.jl is cross-validated against NIST-JANAF reference data for seven species (CO₂, N₂, CO, H₂O, O₂, NH₃, SO₂), with a point-by-point audit (glenn_vs_nist.csv) and aggregated statistics.

Community adoption — Clapeyron.jl ships a GlennJL ideal-gas model built on the NASA coefficient database maintained by Glenn.jl (PR #616).

• Rezende, J. A. M.; Leão Junior, R. G.; Gomes, O. S. M. Scientometric analysis of publications on household electricity theft and energy consumption load profiling in a smart grid context. Sustainability, 2024. 10.3390/su16229921
• Lemos, L.; Goulart, P.; Leão Junior, R. G.; Carpio, R.; Fernandes, M. T. Exergy analysis of the electricity generation process in the reuse of blast furnace gases in a steelmaking company. Proc. 26th International Congress of Mechanical Engineering (COBEM), 2021. 10.26678/abcm.cobem2021.cob2021-1887
• Leal, G.; Leal, J. M.; Gomes, A.; Carpio, R.; Leão Junior, R. G. Calibration of a low-cost digital hygrometer for measuring moisture in sugarcane bagasse. Proc. 27th International Congress of Mechanical Engineering (COBEM), 2025. 10.26678/abcm.cobem2023.cob2023-0533
• Lopes, F. F.; Leão Junior, R. G. Proposal for a new methodological approach to measure the concentration of methane in biogas using a low-cost sensor. Proc. 18th Brazilian Congress of Thermal Sciences and Engineering (ENCIT), 2020. 10.26678/abcm.encit2020.cit20-0171
• Leão Jr, R. G.; Sousa, R. V.; Oliveira, A. H.; Leonardo Silva, H. L.; Mourão, A. P. Validation of a computational model of a VARIAN CLINAC 2100 linear accelerator using the EGSnrc code for small-field dosimetry, validated against commissioning measurements. Brazilian Journal of Radiation Sciences, v. 6, n. 1, 2018 (in Portuguese). 10.15392/bjrs.v6i1.314
• Leão, R. G.; Sousa, R. V.; Oliveira, A. H.; Silva, H. L. L.; Mourão, A. P. Computational analysis of "Dose/Collision Kerma" relationship and lateral boundary in stereotactic circular fields using EGSnrc. Revista Brasileira de Física Médica, v. 10, n. 1, 2017. 10.29384/rbfm.2016.v10.n1.p2-8

Nuclear engineering and radiation-science papers are listed on my Google Scholar profile.

Interested in research, academic projects or computational challenges? I am open to collaborations.

• 💬 Ask me about: computational physics, nuclear engineering, numerical simulation, Python/Julia for engineering
• 🔭 Working on: advanced simulation models for energy systems and scientific libraries in Julia
• ⚡ Code is the modern laboratory of the theoretical physicist