RFS

Counterflow diffusion flames are a canonical problem in combustion simulations

Solution to these system of equations are used to perform large-scale calculations in a faster manner

RFS (Robust Flamelet Solver) is a mixture-fraction space based flamelet solver with arc-length continuation capabilities

Solving in mixture-fraction space with logarithmic arc-length continuation allows for quick traversal of solution space

How to install and execute?

• Use conda to setup Cantera 3.0 as suggested on its website

• Install the dependencies using pip install -r requirements.txt

Just run

python main.py

The following program illustrates a basic example

import matplotlib.pyplot as plt
from flamelet_problem import FlameletProblem

LAMBDA_0 = -3.
NPTS = 30

# Define the problem
# Use plot_verbose=True to show flamelets each time a new solution is found
problem = FlameletProblem(LAMBDA_0, NPTS)

# Continue the problem
# Entire list of arguments in `flamelet_problem.py` and same as `pacopy.euler_newton`
problem.continuation(
    newton_tol=1.0e-3,
    verbose=False,
    max_steps=3000,
    max_newton_steps=20,
    stepsize0=1.0e-1,
    stepsize_max=1.0e0,
    stepsize_aggressiveness=1e6,
)

plt.plot(problem.chi_list, problem.Tmax_list)
plt.show()

Whom to contact?

Please direct your queries to gpavanb1 for any questions.

Acknowledgements

This would not have been possible without the immense efforts of Spitfire and Pacopy

Sample Hydrogen mechanism is the same one used from Spitfire