[tchitchas]

Hello everyone, I'm having a question regarding time integration.

I developed a code for unsteady flows using FVM, however, my problem evolves in time in a strange way (depends on the Reynolds). In my code, the flow takes almost twice to enter in steady state, when compared to the same problem executed in another code. After moving to the steady state, the results are the same when compared to the benchmark.

For temporal discretization, I used the fully implicit method. To approximate the velocity values on the faces of the control volume I used linear interpolation. Could this be the problem? Since this method of interpolation does not work well for higher Reynolds?

Ps: For Re<200 the temporal evolution occurred in an expected way.

Thank you in advance.