Time step size
 

Hello!

I ran 2 analysis of the same mesh. The only difference was the time step size. One is ten time smaller than the other one. The residual history is better for the smaller time step size analysis. Concerning the results, the pressure distribution is better with the smaller time step size, but the concentration distribution looks really better with the bigger time step size! I don't understand!!! is it possible than even if some results look correct they are not? A smaller time step size should always be better, doesn't it?

Thanks

Aline

Re: Time step size
 

Do you simulate a free-surface flow? If yes, can you explain what you mean by "the concentration distribution looks really better with the bigger time step size"?