Central DIfference

Glen

Hi,

I am trying to incorporate Central Difference scheme, for convetion terms in my code, as I am aware from the Literature that it is very unstable, so I tried to use the deferred correction technique(for convection terms only) that was mentioned in the Ferzier, Peric's book, and code which was blowing before began to run normally...

But the problem I am facing is that, for the Backward facing step, I am not able to see the circulation bubble, behind the step, and all the vectors seem to be directed only in one direction and not in the other direction, (that is there is no negative velocity)

Any help in this regard will be highy appreciated!!

Thanks in advance,

Glen.