Has anybody experienced abrupt SW crashes while attempting to run a Flow Simulation model with porous medium?  When defining porous medium, SW gives you several options of how to to define it, such as "pressure drop, flow rate, dimension", "dependency on velocity", "dependency on pore size", and "dependency on pore size and Reynolds #". It's the last one that causes my SW session to hopelessly crash before the very first iteration. How do I submit a bug report on this?