DLBFoam: An open-source dynamic load balancing model for fast reacting flow simulations in OpenFOAM

Computational load imbalance is a well-known performance issue in multiprocessor reacting flow simulations utilizing directly integrated chemical kinetics. We introduce an open-source dynamic balancing model named DLBFoam to address this within OpenFOAM, C++ library for Fluid Dynamics (CFD). Due the commonly applied operator splitting practice reactive solvers, chemistry can be treated as independent stiff ordinary differential equation (ODE) system each computational cell. As result of highly non-linear characteristics kinetics, large variation convergence rates ODE integrator may occur, leading high across configurations. However, nature systems leads problem that parallelized easily (called embarrassingly parallel literature) during solution. The presented takes advantage feature and balances available resources. Additionally, reference mapping utilized further speed-up simulations. When it with both these features enabled, by factor 10 reported benchmark cases. To best our knowledge, first implementation literature.