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September 2, 2012, 02:10 |
Residuals do not decrease
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#1 |
Senior Member
navid
Join Date: Jan 2010
Posts: 110
Rep Power: 16 |
Hi all,
I am simulating an unsteady flow. my problem is, in each time-step the residuals decrease very fast (like in 10 iterations) to 1e-4 but after that they keep decreasing very very slow to the desired residual criteria which is 1e-5 in my case. Most of the times, they will not reach this limit and simulation continues to next time-step when it reaches the maximum limit of iterations per time-step (which is 80 iterations in my case). Can anybody tell me where does this error come from? is it from the grid or time step or anything else? |
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