Analytical solutions to a coupled fluid dynamics and neutron transport problem with application to GeN-Foam verification

Code verification is an important part of software development process that asserts code correctness. In this work, analytical solutions are used in order to develop a simple multiphysics problem involving coupled fluid dynamics and neutron transport to be used for verification of GeN-Foam. Results show that the analytical solutions are successfully recovered from numerical simulation, with relative errors of the order of less than 0.01%. We conclude that the fluid dynamics and neutron transport solvers of GeN-Foam are working correctly in regard to the limited functionality explored in this test case. Test coverage should be expanded to include additional models, such as turbulence, cross-section parametrization and delayed neutron precursors transport.