Constant-pressure, adiabatic kinetics simulation.

import sys
import numpy as np

import cantera as ct

gas = ct.Solution('gri30.xml')
gas.TPX = 1001.0, ct.one_atm, 'H2:2,O2:1,N2:4'
r = ct.IdealGasConstPressureReactor(gas)

sim = ct.ReactorNet([r])
time = 0.0
states = ct.SolutionArray(gas, extra=['t'])

print('%10s %10s %10s %14s' % ('t [s]','T [K]','P [Pa]','u [J/kg]'))
for n in range(100):
    time += 1.e-5
    states.append(r.thermo.state, t=time*1e3)
    print('%10.3e %10.3f %10.3f %14.6e' % (sim.time, r.T,
                                           r.thermo.P, r.thermo.u))

# Plot the results if matplotlib is installed.
# See to get it.
if '--plot' in sys.argv[1:]:
    import matplotlib.pyplot as plt
    plt.subplot(2, 2, 1)
    plt.plot(states.t, states.T)
    plt.xlabel('Time (ms)')
    plt.ylabel('Temperature (K)')
    plt.subplot(2, 2, 2)
    plt.plot(states.t, states.X[:,gas.species_index('OH')])
    plt.xlabel('Time (ms)')
    plt.ylabel('OH Mole Fraction')
    plt.subplot(2, 2, 3)
    plt.plot(states.t, states.X[:,gas.species_index('H')])
    plt.xlabel('Time (ms)')
    plt.ylabel('H Mole Fraction')
    plt.subplot(2, 2, 4)
    plt.plot(states.t, states.X[:,gas.species_index('H2')])
    plt.xlabel('Time (ms)')
    plt.ylabel('H2 Mole Fraction')
    print("To view a plot of these results, run this script with the option --plot")