Weighted sum of grey gases model

This work was supported by the National Science Foundation under grant number CBET-1403403.

4 gray gases and 1 clear gas.
From paper by M.H. Bordbar, G. Wecel, T. Hyppanen, Combustion and Flame 161 (2014) 2435-2445.
Numeric data is slightly different than in the paper.
Boardbar supplied the data via personal communication, as advertised in the C&F paper Table 1.

Files

wsgg.cc
- C++ function get_k_a(const double T, const double P, double XCO2, const double XH2O, stl::vector<double> &K, std::vector<double> &a) is the interface.
- Inputs: T (temperature, K), P (pressure, Pa), XCO2 (CO2 mole fraction), and XH2O (H2O mole fraction).
- Ouputs: the WSGG array of absorption coefficients K, and weights a are returned as references to stl::vector types in the argument list.
- There is also a simple tester as main() commented at the bottom.
wsgg.py
- Python function get_k_a(T, P, XCO2, XH2O)
- All function parameters are inputs.
- Returns arrays for K and a.
wsgg_params_from_paper.py
- Parameter values are as listed in the published paper.
test_bounds.ipynb
- Plot weights a (or K) versus T, X, etc. to look at behavior outside of the WSGG curve fits.