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May 17, 2017, 18:14
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problem
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#1 |
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New Member
yes
Join Date: Oct 2016
Posts: 17
Rep Power: 9  |
please l need some help
l work on the pem fuel cell modelling using ansys fluent when l run the calculation l had a problem divergence detected: x momentum : increasing the relaxation sweeps please help me than you |
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May 17, 2017, 19:05
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#2 |
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Senior Member
Svetlana Tkachenko
Join Date: Oct 2013
Location: Australia, Sydney
Posts: 407
Rep Power: 14 |
Hello,
This message means the solver could not find a correct solution. There may be many reasons why, including mesh quality, boundary conditions, model parameters, time step, and solver settings. Please simplify your problem excessively (steady inviscid constant properties flow) and if it converges then start increasing complexity by small steps. You can also plot the residuals in your results. Use the "/solve/set/expert" command in FLUENT to enable this feature. |
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May 17, 2017, 19:11
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#3 |
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New Member
yes
Join Date: Oct 2016
Posts: 17
Rep Power: 9 |
l don't understand exactly about what you talk
Sent from my SM-J700H using CFD Online Forum mobile app |
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May 17, 2017, 19:12
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#4 |
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New Member
yes
Join Date: Oct 2016
Posts: 17
Rep Power: 9 |
l work on model transient laminar and normala all the boundary condition are correct because the model was work good and normala
Sent from my SM-J700H using CFD Online Forum mobile app |
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May 17, 2017, 19:13
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#5 |
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Senior Member
Svetlana Tkachenko
Join Date: Oct 2013
Location: Australia, Sydney
Posts: 407
Rep Power: 14 |
1. Simplify your problem as much as you can. It should start converging.
2. Make the problem more complex step by step. This will help you see what the problem is. |
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May 17, 2017, 19:14
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#6 |
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Senior Member
Svetlana Tkachenko
Join Date: Oct 2013
Location: Australia, Sydney
Posts: 407
Rep Power: 14 |
I do not understand this message. "It works with transient and laminar model."? What is the problem then?
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May 18, 2017, 15:31
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#7 |
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New Member
yes
Join Date: Oct 2016
Posts: 17
Rep Power: 9 |
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