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February 20, 2011, 08:48 |
Geometry in ICEM CFD
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#1 |
Member
Join Date: Nov 2009
Location: United Kingdom
Posts: 35
Rep Power: 17 |
Hi guys,
I am trying to create a mesh in ICEM 12.0 to be used as input file for KIVA-3V. I am experiencing some problems once KIVA reads in the mesh and I am checking out all the steps I followed to find the mistakes I made. The mesh is a cylindrical mesh with a central circular region on the bottom surface that will be setup as inflow. The problem I might have with the geometry is that once I apply "Build Diagnostic Topology" I don't get all the lines in red as may seen in the picture. Do you guys think that when some parts of the geometry are in blue, it is because something went wrong and everything should be in red?? Thanks a lot, |
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February 21, 2011, 09:28 |
Multiple Edges.
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#2 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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Blue is a multiple edge... Along those edges you have 3 or more surfaces meeting. In your case the surface of the smaller inner cylinder meets with the two end surfaces (one inside and one out).
It may be fine if that was your design intent, but you should at least be aware of it. Did you intend to have two volumes separated by that inner cylinder surface? Simon |
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February 21, 2011, 10:49 |
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#3 |
Member
Join Date: Nov 2009
Location: United Kingdom
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Hi Simon, thank you very much for your quick replay
No, actually, the point of having the inner region (cylinder) is only in order to include a Boundary Condition at the bottom and top plane. I just need to have one volume to include the whole domain. What I am thinking now is that perhaps I don't need that surface anymore and I can work without it. I thought that I needed that inner cylindrical surface to split the initial block by O-grid, but I have just found out the inner block of O-grid does not need to be assigned to any edge, O-grid only requires the outer edges to be assigned, am I right? Thanks a lot daniel |
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February 21, 2011, 11:23 |
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#4 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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Right... Ogrid doesn't need any geometry to hang on. It scares me to think how hard it would be to use if I also had to chop up all my geometry... (It would be like other meshers !)
You can delete that inner cylinder and proceed from there. |
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February 21, 2011, 11:42 |
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#5 |
Member
Join Date: Nov 2009
Location: United Kingdom
Posts: 35
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Ok that's brilliant, thank you
On the other hand, for the geometry I specified above I would like to use two O-grids, one for the annular region and one for the inner circular region. As far as I understand, you don't need special treatment at the interface between blocks which conform the O-grid, but what about in such a case that you have two O-grids? Do you know whether I will need any special consideration at the interface between the first and second O-grid?? Thanks a lot, daniel |
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February 21, 2011, 12:49 |
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#7 |
Member
Join Date: Nov 2009
Location: United Kingdom
Posts: 35
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that's great!
Thank you very much daniel |
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January 3, 2012, 12:32 |
examples for kiva 3V or kiva 4.
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#8 |
New Member
ninguna
Join Date: Oct 2011
Posts: 6
Rep Power: 15 |
Hi, I'm working with kiva 3V.
I need examples for kiva 3V or kiva 4. non engine application. someone who can help me? someone who has worked with kiva 3v or kiva4? I'm trying to simulate a spray impacting on a surface. |
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