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June 3, 2010, 05:45 |
2D suction in ANSYS CFX 12.1
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#1 |
New Member
Apostolis
Join Date: Jun 2010
Posts: 1
Rep Power: 0 |
Hello everyone. I am interested in applying suction on a 2D body (cylinder or airfoil) but I am having trouble defining the suction location. The idea is to select a specific segment along the body's curve, define it as an outlet and apply velocity boundary conditions so I can control the suction velocity. For the cylinder case, I am able to define a circular arc via the split curve command in DesignModeler, however when I proceed to the Mesher and the Setup, the arc is not there i.e. the programm does not recognize it and therefore I cannot apply different conditions on it. Oddly enough, if instead of a circle I design a square and proceed to the Mesher and the Setup, ANSYS recognizes each of the four edges separately and different boundary conditions can be applied on each one. I did found this thread http://www.cfd-online.com/Forums/cfx...l-porous-wall- cfx.html but no answer has been given to the guy asking. It sounds really simple, what am I missing? I will appreciate any kind of advice you can give me. Thank you for your time, Apostolis
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June 3, 2010, 09:01 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,854
Rep Power: 144 |
You will have to define the region for suction to be applied in DesignModeller. Cut it out of the full shape and it will come into CFX-Pre as a different surface so you can assign a different boundary to it.
The questions referred to in the link is completely different and asks how do you apply the boundary condition while still retaining a no slip wall. The answer is to use a mass source/sink on a wall boundary, this will do it. |
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suction |
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