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Cantera

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cantera
Chemical kinetics, thermodynamics, and transport tool suite

C++ · 854 stars

Beginner friendly Everything

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Allow custom bounds for ExtensibleReactor state components Open

Reactors

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Cantera/cantera#2156 · Opened Jul 27, 2026
Intermittent CI errors with Intel OneAPI 2026.1 Open

CI

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Cantera/cantera#2151 · 4 comments · Opened Jul 7, 2026
CoverageDependentSurfPhase does not satisfy Gibbs-Duhem relation Open

Thermo

Difficulty 5/5 Over a week Newbie friendliness 30/100

Cantera/cantera#2133 · Opened Jun 10, 2026
DebyeHuckel "B-dot with variable a_k" does not satisfy Gibbs-Duhem relation Open

Thermo

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Cantera/cantera#2132 · Opened Jun 10, 2026
Metal/electron-cloud: thermo consistency errors caused by placeholder density Open

Thermo

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Cantera/cantera#2131 · Opened Jun 9, 2026
Incorrect reference state in some of the YAML files. Open

Input

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

Cantera/cantera#2129 · 1 comment · Opened Jun 4, 2026
The electron temperature is not correctly saved in a SolutionArray. Open

Serialization

Difficulty 3/5 1-2 days Newbie friendliness 55/100

Cantera/cantera#2119 · 1 comment · 2 reactions · Opened May 25, 2026
ct.Reaction(reactants=..., products=...) treats species appearing on both sides as a third-body collider Open

Input

Difficulty 3/5 1-2 days Newbie friendliness 64/100

Cantera/cantera#2115 · 3 comments · Opened May 11, 2026
Intermittent CI test failures in Matlab toolbox Open

CI Matlab

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Cantera/cantera#2045 · 2 comments · Opened Nov 14, 2025
Older MATLAB fails for newer Linux glibc Open

Linux Matlab

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#2035 · 6 comments · Opened Nov 5, 2025
MATLAB's outofprocess mode has massive overhead Open

Matlab

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#2034 · 1 comment · Opened Nov 4, 2025
MATLAB toolbox does not display stdout Open

Matlab regression

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Cantera/cantera#2005 · 10 comments · Opened Oct 12, 2025
Incorrect flame sensitivities caused by reactions with large reverse rate constants Open

1D Flames

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Cantera/cantera#1942 · 1 comment · Opened Aug 15, 2025
VCS equilibrium solver jumps between different solutions for mixtures with binary-solution-tabulated phase Open

Thermo

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Cantera/cantera#1928 · 3 comments · Opened Jul 16, 2025
Inconsistent Size of `net_production_rates` in `ReactorSurface()` Object Open

Kinetics question

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#1874 · 11 comments · Opened Apr 16, 2025
`auto` argument to 1D `solve()` method slows down the solve Open

1D Flames discussion

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Cantera/cantera#1873 · 6 comments · Opened Apr 15, 2025
Multicomponent transport model fails for single-species phases Open

Transport

Difficulty 3/5 1-2 days Newbie friendliness 50/100

Cantera/cantera#1823 · Opened Dec 2, 2024
Build fails with LTO due to type mismatch/ODR violations Open

compiling

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Cantera/cantera#1783 · 7 comments · Opened Aug 20, 2024
Incorrect densities for a Peng-Robinson fluid when it should be in the liquid phase Open

Thermo

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Cantera/cantera#1721 · 3 comments · Opened Jun 21, 2024
Enable multiphase equilibrium calculations involving surface phases Open

enhancement Equilibrium

Difficulty 5/5 Over a week Newbie friendliness 30/100

Cantera/cantera#1720 · Opened Jun 21, 2024
MixtureFugacityTP::solveCubic fails for certain temperatures and pressures Open

Thermo

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#1699 · 4 comments · Opened May 26, 2024
Add support for converting BULK phase definitions from Chemkin input files Open

enhancement Input

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#1698 · 1 reaction · Opened May 25, 2024
Validation for PLOG rates fails for extremely high pre-exponential factors after Cantera 2.6 release Open

Kinetics

Difficulty 4/5 3-5 days Newbie friendliness 40/100

Cantera/cantera#1405 · 21 comments · Opened Nov 4, 2022
Fail to converge for zeroD simulation Open

Reactors

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#1400 · 2 comments · Opened Sep 30, 2022
Synchronization of `ReactionRate` objects: `Reaction` vs `MultiRate` Open

Kinetics

Difficulty 5/5 Over a week Newbie friendliness 25/100

Cantera/cantera#1211 · 5 comments · Opened Mar 6, 2022
Repeated solution of the reactor Network object leads to an error. Open

bug Reactors

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#1117 · 3 comments · Opened Oct 11, 2021
Numeric solver runaway using ReactorNet.advance_to_steady_state Open

documentation enhancement Reactors

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#989 · 5 comments · Opened Mar 7, 2021
Pure substance convergence failure setting "UV" near saturation condition Open

bug Thermo

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Cantera/cantera#971 · 6 comments · Opened Feb 3, 2021
IdealGasPhase getStandardChemPotentials Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#841 · 7 comments · Opened Apr 4, 2020
Improve handling of duplicate reaction check for reactions that are multiples of one another Open

Input Kinetics

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#704 · Opened Sep 12, 2019
Fix implementation of advance_to_steady_state Open

enhancement Reactors

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Cantera/cantera#654 · 6 comments · 1 reaction · Opened Jun 16, 2019
setMoleFractions violates model assumptions for surfPhase thermo phase Open

bug Thermo

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cantera/cantera#633 · 11 comments · Opened Apr 30, 2019
1D solver can fail when flames propagate too close to inlet boundary Open

1D Flames bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

Cantera/cantera#384 · Opened Nov 10, 2016
Fundamental flaws in Gibbs and VCS algorithms for constant enthalpy / energy / entropy Open

bug Equilibrium

Difficulty 5/5 Over a week Newbie friendliness 35/100

Cantera/cantera#334 · 1 comment · Opened Apr 18, 2016
VCS solver finds incorrect solution by extrapolating thermo data Open

bug Equilibrium

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Cantera/cantera#270 · 1 comment · Opened Jun 10, 2015

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