RE: [femm] Hysteresis

Using the approximate approach for modeling hysteresis that you have implemented in your model has worked for me in the past as a "history matching" parameter. As a predictive tool an approach using Preisach's Theory might be useful. I would like to take a stab at implementing hysteresis into your code. It would be tremendously beneficial to me (hysteresis losses in steel pipes) and I am sure others might find it useful. Have you looked at Preisach's Theory. I know several researchers have implemented this approach into FEM code, however I do not know the success of this approach. I used a time stepping approach around the BH loop as H varied with time; in FDTD this was a very direct approach. Any suggestions.