Difference between Elmer, Freefem++ and Caffa

Pierre

Hello,

I solved a Navier-Stokes equation problem with 3 differents solvers:

- FreeFem++ - Elmer - Caffa

I have to make a synthesis of results to explain the differences between the 3 simulations.

Somebody would be able to help me ? I just want to know what can explain the differences between a Freefem solution and an Elmer solution for example.

Thanks.