Standalone reservoir simulator

Scripts are interactive and useful for doing setup, simulation and post-processing in one file, but sometimes you want to run a big model unmodified from an input file:

• As an alternative to a pure Julia workflow, JutulDarcy.jl can be compiled into a standalone reservoir simulator

• This makes MPI simulations more ergonomic

• Compiling the code saves time when running multiple simulations

• The resulting executable is a standard command-line program - no Julia experience needed

• Output is given in the same format as regular simulations, can load data by restarting a simulation from the same output_path

This workflow uses PackageCompiler.jl. For more details and an example build file with keyword arguments, see the JutulDarcyApps.jl repository.

A few things to note:

• The simulator comes with a set of shared library files and will be ~500 mb

• Binaries will match platform (compiling under Linux gives you Linux binaries)

• The repository has a script that runs small "representative" models

• You can input small representative models in precompile_jutul_darcy_mpi.jl to make sure that compilation is avoided during simulation

• By default, the script uses the default Julia MPI binary. On a cluster, the build script may have to be modified to use the MPI type of the cluster using MPITrampoline.jl

If you get it working on a complex MPI setup, feedback on your experience and PRs are very welcome.