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-   -   [ICEM] Complex 3D geometry Hexa blocking and inflation layer (http://www.cfd-online.com/Forums/ansys-meshing/92798-complex-3d-geometry-hexa-blocking-inflation-layer.html)

Chipsgrottel September 26, 2011 01:43

Complex 3D geometry Hexa blocking and inflation layer
 
Hello everybody,

I am currently working on the meshing process of a very complex geometry (see the printscreens).

http://img84.imageshack.us/img84/2342/3dtrans.png
To have a better idea of the different volumic parts composing this part, I've tried to upload a small gif animation (the flow enters on the left side, goes through the purple tube, then goes out by the 8 holes to an annular part and goes downstream to the right)
Follow this link to see it: http://img851.imageshack.us/img851/9885/s9o.mp4


Unfortunately I am encountering a few problems and doubts:
  • I want a smoothly refined mesh nearby the walls, that is why I play with the edge parameter on the O-grids I already defined. It works pretty well around the area of interest but how can I avoid it to propagate in the middle of the volume part? (the picture represents a cut-view in the midplane z, perpendicular to the stream)
  • http://img695.imageshack.us/img695/9...ationlayer.png
  • Then I am trying O-grids that do not work. I assume that I have to make them go through everything even if I just want them around the 8 holes you can see on the video (and where I want the refined boundary as well).
    It might be due to the fact that I already have almost 300 blocks but the resulting blocks from the O-grid cut are all inverted and it is really hard to size them and control anything about them.http://img710.imageshack.us/img710/8...ockingopen.jpg
  • To finish I have issues while importing the mesh to Fluent: I get this error message:
    Building... mesh
    Cell Centroid is xc 162.783433 yc -9.597915 zc -8.724681
    WARNING: no face with given nodes. Thread 35, cell 254010
    Clearing partially read grid.

    Error: Build Grid: Aborted due to critical error.
    Error Object: #f
I would be really grateful for any help.
Thank you in advance for your attention.

Charles

Chipsgrottel September 28, 2011 15:28

Anybody has an idea?
At least for the bounday layer inflation issue?

BrolY September 29, 2011 03:15

I can't see your picture and I don't have access to the web site imageshack at work. Post your CAO here so we could have a look.

About your fluent error, you should create a new thread.

Chipsgrottel September 29, 2011 08:58

1 Attachment(s)
Hi BrolY,

Is parasolid ok?
In my post I focused on the first left half of the geometry as you will see. But I think my problem is going to be the same for the second half.
Thank you very much for your help.

BrolY September 30, 2011 03:25

Sorry I can't open parasolid geometry file. Please convert it to .Stl format.
Thanks


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