Can you all give me (at least) one example about [convection-dominated problem](https://math.stackexchange.com/questions/423985/what-is-convection-dominated-pde-problems "a question about this problem has been solved in MathExchange") in order that I can test it (them) on FreeFEM++. If possible, please give me specific examples (it/they contain(s) full equations, boundary condition, initial condition, value of parameters, code in FreeFEM++,...)