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January 4, 2017, 10:43
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isolated region problem
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#1 |
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New Member
venkatesh
Join Date: Nov 2016
Posts: 7
Rep Power: 9  |
+--------------------------------------------------------------------+
| Checking for Isolated Fluid Regions | +--------------------------------------------------------------------+ 3 isolated fluid regions were found in domain Default Domain If the isolated regions do not have the pressure level set either by the boundary conditions or using a reference pressure equation, you may encounter severe robustness problems. This situation may have arisen because a domain interface was not properly defined during problem setup. Please carefully check the setup. The solver will stop now and write a results file. The isolated regions can be visualised in CFX Post by making plots of the variable "Isolated Volumes". If you are sure that the pressure level is set in each isolated fluid region then you can force the solver to turn off this check by setting the expert parameter "check isolated regions = f". what are the possibilities of this error |
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January 4, 2017, 17:05
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#2 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,731
Rep Power: 143 |
The implications are exactly what it says - you may have convergence difficulties. But this situation is common in things like heat exchanger models and often the simulation runs OK desipte the warning. So it is just a notice to the user to be aware of the issue.
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January 4, 2017, 18:54
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#3 |
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New Member
venkatesh
Join Date: Nov 2016
Posts: 7
Rep Power: 9 |
But the solver does not starts to solve after this error...It exits with error code 1
Sent from my Nexus 5X using CFD Online Forum mobile app |
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January 4, 2017, 21:11
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#4 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,731
Rep Power: 143 |
Sorry, yes, it is an error which stops the solver.
Your choices are: Fix the problem and connect the isolated volumes or Use the work-around expert parameter - and make sure you know the implications of this. |
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January 4, 2017, 21:14
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#5 |
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New Member
venkatesh
Join Date: Nov 2016
Posts: 7
Rep Power: 9 |
Can u please tell me how to use expert parameters
Sent from my Nexus 5X using CFD Online Forum mobile app |
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January 4, 2017, 23:53
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#6 | |
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Senior Member
Join Date: Aug 2014
Location: UK
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January 5, 2017, 09:29
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#7 |
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New Member
venkatesh
Join Date: Nov 2016
Posts: 7
Rep Power: 9 |
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December 10, 2022, 05:23
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#8 | |
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New Member
Wei Liu
Join Date: Aug 2022
Posts: 1
Rep Power: 0 |
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