|July 1, 2013, 08:57||
Solution changing with dt.
Join Date: Jun 2010
Posts: 20Rep Power: 8
I have a code in cylindrical coordinates that uses central differences. My problem is this: when I change the time step size, keeping everything else the same(grid included), I get vastly differing solutions.
Been breaking my head over this - any ideas??
Thanks in advance!
|July 2, 2013, 05:09||
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 2,600Rep Power: 33
I think that the discussion of your problem must be better focused:
- what variable you see that strongly change with dt?
- what about the cell Re number? are you sure to fulfill the stability constraint?
- have you experienced the same behavior for refined h steps?
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