Improved full-spectrum k-distribution implementation for inhomogeneous media using a narrow-band database

- We expanded narrow-band k-distribution database to wider thermodynamic ranges.
- Databased k-distributions were updated using the latest spectroscopy databases.
- A new correlated k values calculation scheme is proposed.
- New scheme conserves emission and improves absorption predictions.

A new implementation to determine the correlated k values as used in full-spectrum correlated k-distribution methods for inhomogeneous media is presented, which conserves radiative emission and significantly improves the accuracy of the full-spectrum correlated k-distribution method in strongly inhomogeneous media. In addition, an update of a previous high-accuracy, compact narrow-band k-distribution database is given. The new narrow-band database utilizes the latest spectroscopy databases to ensure accuracy at elevated temperatures and pressures. Differences between the two versions of narrow-band k-distribution databases as a result of the change of spectroscopy databases are illustrated.