Contents Part III: Solution Mode | Chapter 45: Running Ansys Fluent on Arm Compute Nodes | Print page 45.2. 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. « 45.1. Setting up Fluent for Arm 45.3. Starting Fluent for Arm »