[Simbelmynë]

Hi,

I have an incopressible code that produces correct results when compared to the literature for lid driven cavity flow.

I have a few questions though:

1. When I check the continuity equation it seems that it is quite far from zero, in the order of 1e-1 for the cavity flow case. Can a code produce correct results without continuity satisfied?

2. The code is transient and I am not really sure how to judge steady state conditions other than plotting the velocity in a few points. The time derivative is never zero even if the velocities do not change in the monitoring points.

3. With regards to 2. above I wonder if it is good to sum all velocities in all cells and subtract the result from a previous time-step result in order to find whether a steady state has occurred. It seems that I need to include the time-step here in some way as well since a small time-step should yield a smaller change in the flow field.

Any suggestions?

Thanks. =)