RHEO or Reproducing Hydrodynamics and Elastic Objects is a package to model multiphase fluid systems. The authors include Joel Clemmer (Sandia), Thomas O'Connor (Carnegie Mellon), and Eric Palermo (Carnegie Mellon). Bond style rheo/shell, compute style rheo/property/atom, and fix style rheo/temperature depend on the BPM package, so it is required to install the BPM package with RHEO. This package requires the BLAS/LAPACK. This can be either a seperate installation or you can use the bundled "linalg" library. Please see the LAMMPS manual at https://docs.lammps.org/Build_extras.html#rheo for details.