uclchem.constants

UCLCHEM Constants Module.

This module provides access to canonical constants defined in the Fortran backend. Values are read directly from the compiled f2py_constants module to ensure Python and Fortran stay in sync without code generation.

The values in this module reflect the current compiled state of UCLCHEM. If you run MakeRates to change the network size or coolants, you must reinstall UCLCHEM for these constants to update:

1. Run makerates: python -m uclchem.makerates.makerates user_settings.yaml

2. Reinstall: pip install . –force-reinstall –no-deps

3. Verify: python -c “from uclchem import constants; print(constants.n_species)”

Module Contents

uclchem.constants.BOLTZMANN_CONSTANT_CGS = 1.38e-16

uclchem.constants.CENTIMETERS_PER_PARSEC = 3.086e+18

uclchem.constants.DVODE_STAT_NAMES = ['TRAJECTORY_INDEX', 'ISTATE', 'HU', 'HCUR', 'TCUR', 'TOLSF', 'NST', 'NFE', 'NJE', 'NQU',...

uclchem.constants.GRAVITATIONAL_CONSTANT_CGS = 6.67e-08

uclchem.constants.HYDROGEN_MASS_CGS = 1.6736e-24

uclchem.constants.NCOOLANTS

uclchem.constants.N_DVODE_STATS

uclchem.constants.N_PHYSICAL_PARAMETERS

uclchem.constants.N_SE_STATS_PER_COOLANT

uclchem.constants.N_TOTAL_LEVELS

uclchem.constants.PHYSICAL_PARAMETERS = ['Time', 'Density', 'gasTemp', 'dustTemp', 'Av', 'radfield', 'zeta', 'dstep', 'parcel_radius',...

uclchem.constants.PLANCK_CONSTANT_CGS = 6.62606896e-27

uclchem.constants.SECONDS_PER_YEAR = 31556900.0

uclchem.constants.SE_STAT_NAMES = []

uclchem.constants.SPEED_OF_LIGHT_CGS = 29979245800.0

uclchem.constants.TIMEPOINTS = 2000

uclchem.constants.ZETA_0 = 1.36e-17

uclchem.constants.default_elements_to_check: list[str] = ['H', 'N', 'C', 'O']

uclchem.constants.default_param_dictionary

uclchem.constants.msg = 'PHYSICAL_PARAMETERS length (11) does not match N_PHYSICAL_PARAMETERS from Fortran (Instance of...

uclchem.constants.n_reactions

uclchem.constants.n_species