  The Open Porous Media (OPM) initiative is a community effort that encourages
open innovation and reproducible research for simulation of porous media
processes. OPM coordinates collaborative software development, maintains and
distributes open-source software and open data sets, and seeks to ensure that
these are available under a free license in a long-term perspective.
  In this paper, we present OPM Flow, which is a reservoir simulator developed
for industrial use, as well as some of the individual components used to make
OPM Flow. The descriptions apply to the 2019.10 release of OPM.
