Contents Part III: Solution Mode | Chapter 44: Running Ansys Fluent on Arm Compute Nodes | Print page 44.2. Message Passing Interface (MPI) Supported with Fluent for ArmFluent for Arm provides Open MPI 4.0.5 within the package. Open MPI is the default MPI and the only MPI available in the package. « 44.1. Setting up Fluent for Arm 44.3. Starting Fluent for Arm »