'Solution' object has no attribute 'set_equivalence_ratio'

[Shonn McNeill]

When I run the code the below using Python 3.5 I get the following error:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-20-6c59b4df68d5> in <module>()
     10 for i in range(len(phi)):
     11     gas1.TP = 300, ct.one_atm
---> 12     gas21.set_equivalence_ratio(phi[i], 'CH4', 'O2:1, N2:3.76')
     13     gas1.equilibrate('HP')
     14     T_complete[i] = gas1.T

AttributeError: 'Solution' object has no attribute 'set_equivalence_ratio'

I have looked up the "set_equivalence_ratio" and it is an object in the ThermoPhase Class which is a base class for the Solution class used in the code.  For reference this is the flame_temperature.ipynb tutorial file from here.

 

%matplotlib notebook

import cantera as ct

import numpy as np

import matplotlib.pyplot as plt    

# Get all of the Species objects defined in the GRI 3.0 mechanism

     species = {S.name: S for S in ct.Species.listFromFile('gri30.cti')}

     # Create an IdealGas object with species representing complete combustion
     complete_species = [species[S] for S in ('CH4','O2','N2','CO2','H2O')]
     gas1 = ct.Solution(thermo='IdealGas', species=complete_species)

     phi = np.linspace(0.5, 2.0, 100)
     T_complete = np.zeros(phi.shape)
     for i in range(len(phi)):
         gas1.TP = 300, ct.one_atm
         gas21.set_equivalence_ratio(phi[i], 'CH4', 'O2:1, N2:3.76')
         gas1.equilibrate('HP')
         T_complete[i] = gas1.T

[Bryan W. Weber]

Dear Shonn,

What version of Cantera are you using? IIRC, the set_equivalence_ratio method is only available in the developer 2.3.0 versions.

Regards,

Bryan

[Shonn McNeill]

Looks like Running Cantera Version: 2.2.1

[Bryan W. Weber]

Right, so that version is too old. You can either upgrade to the developer version, or calculate the mole fractions yourself.

Regards,
Bryan

[vaibhav patel]

Hi Bryan,

can you  please forward me the link to download cantera 2.3.0 version?

Regards,
Vaibhav

[Bryan W. Weber]

Vaibhav,

If you are using MATLAB or C++ you will need to compile it yourself: http://cantera.github.io/docs/sphinx/html/compiling.html#windows

Or, you can use the Anaconda Python distribution and install only the Python package by writing

conda install -c cantera/label/dev cantera

at the command line.

Regards,

Bryan