The Battlefield Environment Division Modeling Framework (BMF). Part 2. Serial and Parallel Output Enhancements

The treatment of inputoutput IO is critically important in computational fluid dynamics CFD for scalable high-performance computing HPC and overall data longevity. The Battlefield Environment Division Modeling Framework BMF v0.90 was developed for the purpose of reducing source code complexity and development time by reducing repetitive, error prone or tedious operations in source code through the use of object-oriented program OOP design. Here we extend BMF to include IO functionality for serial and distributed compute configurations. The Atmospheric Boundary Layer Environment ABLE model has been built using BMF, and ABLE now uses the IO enhancements to BMF to enable serial and parallel output, and an output buffering mechanism using dedicated output processes. Using the parallel, buffered output features, ABLE performed lid-driven cavity flow simulations and shear instability simulations saving approximately 1 GB of model state and analysis data every output time step. There was no appreciable delay when comparing these output time steps to time steps with no output.