[krihamm]

Hi,

I am doing a transient simulation at Mach 1 to determine drag. I have added a monitor point to monitor the progression of drag. Time step is set to <delta x / u, upwind advection scheme, first order backward Euler transient scheme, first order turbulence numerics.

The monitor point is so far (after approx 11 hour simulation) smooth and still decreasing, although not converged yet. The residual profile is however showing no signs of smoothing out (see attachment).

How important is it that the residual profile is smooth when determining the accuracy of a simulation? If the monitor point eventually converges, is that enough to conclude good results, or should I troubleshoot and see if I can improve the residual profile?

Thanks!