Multi Analysis Driver

[sean-engelstad]

• may want to different kind of analyses (some steady / unsteady and some oneway-coupled vs coupled within the same optimization problem) such as a fully coupled aerothermoelastic analysis for stress but also a oneway-coupled buckling analysis
• Idea is to make the funtofem model manage the drivers and you could have multiple drivers or something. Want a way to do this that hopefully IS backwards compatible (i.e. don't want to make too many changes if I can help it).
• Maybe the model can be a driver itself and you can register each of the drivers to the model? That seems like it might work. Or you can just make a driver called SuperDriver or MixedDriver or something like that.. needs work on the name there.
• For the buckling one you would want to modify solve_forward to let you pick which scenarios to call so that the call chain is:

1. coupled forward analysis of scenario1
2. buckling forward analysis of scenario1
3. coupled forward analysis of scenario2
4. buckling forward analysis of scenario2

Instead of the NLBGS driver doing both coupled forward analyses first.