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Turning off equations during solution in CFX, like fluent. |
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April 26, 2015, 09:25 |
Turning off equations during solution in CFX, like fluent.
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#1 |
Member
Adil Syyed
Join Date: May 2012
Posts: 49
Rep Power: 14 |
In fluent, we can turn off an equation (say energy equation) at the start of the solution. After some iterations, we stop the solver and turn on the energy equation again.
This technique is very useful when initially the solution tends to diverge. Is it possible to do this in ANSYS CFX? |
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April 26, 2015, 18:03 |
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#2 |
New Member
Kushal J
Join Date: Apr 2015
Location: chicago
Posts: 5
Rep Power: 11 |
I think this should be doable through expert parameters in CFX. search for the expert parameters in ANSYS documentation or look in CFX-pre, Insert -> Solver -> Expert Parameter.
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April 26, 2015, 18:38 |
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#3 | |
Member
Adil Syyed
Join Date: May 2012
Posts: 49
Rep Power: 14 |
Quote:
Thank you Sir. |
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April 27, 2015, 04:57 |
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#4 |
Senior Member
Thomas MADELEINE
Join Date: Oct 2014
Posts: 126
Rep Power: 12 |
to select which equation you want to activate or deactivate :
go to expert parameter -> last tab "model override" -> and then select the equation you want to modify (by default it is on solving of course) for the stability I would rather use an under relaxation parameter (in the expert parameter too) or play with the order of the calculation like something with the first order and no turbulence as initialization for example. |
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