[Jongmin Choi]

Hi, I 'm a beginner of the ANSYS


Whenever I run caculation, I have confronted a complex graph that is shown on the console window in ANSYS.

It seem secret password for me. Could you expain the graph that I will attach briefly? I mean I wonder why these lines pop up periodically and why these lines decrease slightly overall except for the 'poping up section.'

I also attach the tutorial problem which is about the graph.


Thank you teachers!!

[pakk]

Those are the residuals, they (roughly) show how far converged your solution is.
Lower is better!

In your case, you see that in most iteration steps, the residuals are going down. This is good: your simulation is converging. If it would be diverging, residuals would go up all the time.
In some iterations, the residuals go quickly up a lot. This usually means that some settings were changed, and from the picture it looks like in your case the mesh was adapted. If the mesh is adapted, the 'old' solution is no longer so good, that is why you see increased residuals.

[Jongmin Choi]

Thank you pakk You are so kind

[Noobism]

The reason you see peaks at frequent intervals is because the current time step is over and the next iteration has begun, i am not sure what the iterations per time step or time step size is ,but u should probably increase the iterations per time step so that the solution is a bit more accurate.

[Jongmin Choi]

Thanks Noobism !!! I will try what you've recommended!!