I know a little about fenics and freefem.
There exists a big difference between those and OpenFoam?
They are used in a similar way (editing a file and writing code)? or perhaps it is made for other types of problems? Is it appropriate for solid-structure coupled problems?
Finally, is it better than the previous ones in some sense? (Or perhaps it is so different that this question does not make sense).
My question is to know if I spend time learning how to use it.