[Natali_Beginner]

Hello,
I am very beginner in CFD, sorry that I ask this question.
I am wondering how to compare a problem in steady and unsteady.
Because I think any problem that is steady can be solved unsteady as well.
However, I am running a case, but heat transfer coefficient in steady state is much much larger than that of unsteady. The problems were runned for some hours and when I see the transient solutions, it seems they reached to a steady state.
So, if the transient solution reached to steady state, why the results of steady and unsteady heat transfer coefficients are not the same?

Again, sorry if my question was childish but I really need your experts.
Natali