RANSBox: A zero-dimensional modular software package for Reynolds-averaged Navier-Stokes modeling

RANSBOX is a zero -dimensional software package for Reynolds -averaged Navier-Stokes (RANS) modeling developed at Lawrence Livermore National Laboratory to support common implementation of RANS models across a variety of host codes with different numerical schemes and code bases. This work describes the key features of RANSBOX including "model -agnostic integration," which allows new models to be implemented in RANSBOX and quickly deployed to host codes without additional changes to the host code base. Three onedimensional test problems with analytical asymptotic properties are described which can be used to verify correctness of RANSBOX integration. Results for these problems are then compared across different RANS models in a single code and across different codes with a common RANS model. By using a common model implementation in RANSBOX , host codes with different numerical schemes and formal orders of accuracy are demonstrated to predict the expected behavior for the three test problems.