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December 3, 2011, 00:02 |
iteration problem
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#1 |
New Member
Join Date: Oct 2011
Posts: 14
Rep Power: 14 |
i have this kind of problem, in all case if i set the solution method to 1st order, the iterations would be converged for the first few time steps, after that, the iterations can't come to converge point. but if i set to 2nd order, then all the iterations can't go to converge point.
i have tried time step from 0.001, 0.005, 0.01, 0.02, 0.05s, all react the same. my case is a fan blowing 1.48m/s hot air to dry a piece of cotton fiber which is 0.15m away. is the time step still too large for it? or i have done something wrong? below is how the iterations look like when i use 1st order. |
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December 3, 2011, 03:14 |
Hi
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#2 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 14 |
just try to use a much higher order schemes like quick and coupled and use much less time step.
SHK |
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December 3, 2011, 06:07 |
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#3 |
New Member
kamran
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
Use smaller mesh.Maybe it works.
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December 3, 2011, 07:04 |
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#4 |
New Member
Join Date: Oct 2011
Posts: 14
Rep Power: 14 |
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December 3, 2011, 12:54 |
hi
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#5 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 14 |
use higher order schemes it will work in ur pv
there is no problem in using higher order schemes in it SHK |
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