title: "KIVA-II: A computer program for chemically reactive flows with sprays" authors: A. A. Amsden, P. J. O'Rourke, T. D. Butler year: 1989 URL: https://doi.org/10.2172/6228444 –- Also check Liu1993 [15] (in OpenFOAM generalization to distortedSphereDrag).