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July 4, 2018, 06:40 |
Stage interface doesn't work as intend?
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#1 |
Senior Member
Oskar
Join Date: Nov 2015
Location: Poland
Posts: 184
Rep Power: 11 |
Dear CFX Users,
I'm using CFX 16 and I'm facing strange behavior of stage interface in CFX Turbomachinery simulation of Axial Turbine. I believe it could be cause by mesh or bad settings. Please, see the attachments. velocity1.png and mesh1.png shows velocity and mesh on the stator side of interface. velocity2.png and mesh2.png shows circumferential averaged velocity and mesh on the rotor side of interface. I do not really understand why there is such a large region with close-to-zero velocity on the rotor side. I will appreciate any suggestions, Oskar |
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July 9, 2018, 05:25 |
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#2 |
Member
Join Date: Apr 2009
Location: Czech Republic
Posts: 65
Rep Power: 18 |
Increase number of circumferential bands.
EXPERT PARAMETERS: force intersection = t ggi stage groups max = 250 END |
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July 9, 2018, 11:59 |
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#3 |
Senior Member
Oskar
Join Date: Nov 2015
Location: Poland
Posts: 184
Rep Power: 11 |
Dear Mister Ludvik.
I haven't tried it yet but I think You are right. I'm going to try it as fast as possible to ensure Your solution is right. Thank Your very much. Sheaker |
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December 17, 2018, 14:05 |
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#4 |
Senior Member
Oskar
Join Date: Nov 2015
Location: Poland
Posts: 184
Rep Power: 11 |
Dear Ludvik,
after many attempts I still don't now where to set "ggi stage groups max = 250". Could You possibly point me where to set it? Best regards, Oskar |
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December 17, 2018, 16:50 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,871
Rep Power: 144 |
It is an expert parameter. Not all expert parameters are on the CFX-Pre GUI, many are CCL only. If you use Ludvik's CCL in your CCL it should work.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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December 17, 2018, 17:20 |
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#6 | |
Senior Member
Oskar
Join Date: Nov 2015
Location: Poland
Posts: 184
Rep Power: 11 |
Quote:
Thank You for Your answer, horrocks. I'm going to set it in CCL. (I don't know how to do it yet but I think I can figure it out by myself.) Regards, Oskar I think it does not resolve my problem. I have created CCL file: Code:
FLOW: Flow Analysis 1 EXPERT PARAMETERS: force intersection = t ggi stage groups max = 250 END END COMMAND FILE: Version = 16.0 END
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How to set two stroke engine with scavenging? Salome, sliding interface and "Zero length edge detected." Last edited by sheaker; December 18, 2018 at 01:33. |
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